ChickMoney — Feature Reference and User Guide
Version 1.0.1 · updated 2026-09-10 · Broiler flock management for Taiwan · Data stays on the phone · Works offline · Download on the App Store
1. What this app is for
One flock, from chick placement to the last load out: where the money went, how the birds are growing, which day the vaccination is due, when it pays best to sell. All the things that normally sit scattered across a notebook, a whiteboard, a messaging thread and your own memory, gathered onto one phone.
Three things set it apart from an ordinary bookkeeping app:
- Benchmarked to breeder standards. Body weight, mortality and FCR are compared day by day with the official performance objectives for the breed (AA+ / Ross 308 slow-feathering / Cobb 500), instead of just handing you a number.
- It reminds and it interprets. Problems surface by themselves, vaccinations and treatments push a reminder as they come due, and house temperature and air speed are assessed against target.
- It works down to the individual bird. Not just gross margin — employer insurance contributions, fixed overheads and solar income are all apportioned to give net profit per bird.
2. Three steps to get going
| Step | When | How |
|---|---|---|
| 1. Create the flock | Placement day | Home screen "Create your first flock" → choose breed, contract mode, number of houses and birds |
| 2. Log losses daily | After each walk of the house | Tile 1 on the home screen; hands dirty, tap the microphone and say it |
| 3. Weigh once a week | Saturday is the suggested day | Tile 2; weigh a sample, key the weights in, the curve plots itself against standard |
Once the birds have gone, look at the settlement report and net profit per bird and the flock is closed out.
Under a minute a day.
No birds yet? Take the sample tour first
Before you have placed a flock, the home screen offers "See what a filled-in flock looks like". It loads a worked example — three houses, 30,000 birds, day 28 — so you can walk through losses, the growth curve, costs, net profit and the sell-or-hold calculator with real numbers in place.
- An orange banner stays at the top of the screen the whole time, so the sample is never mistaken for your own records.
- Leave the tour and the sample data disappears immediately. It is never written to the phone, never included in a backup and cannot touch your real records — the two are separate stores.
- Achievements and the logging streak are suspended while the tour is open.
After the first flock: "Do this next"
Creating your first flock puts a three-step card on the home screen: create the flock, log the first losses, take the first weighing. Each one ticks off as you do it, and the card retires itself once all three are done.
3. Reading the home screen
Top half: how today looks
From the top down:
- Alert banner (red / amber): appears only when something has been detected; tap through for the diagnosis and what to do about it.
- Vaccination / medication reminders: what is due today, and what is overdue.
- Flock progress bar: placement → today's day-age → planned catching date.
- Headline card: while costs are still incomplete the headline is growth vs standard (what percentage above or below standard weight the flock is running); once costs are entered it switches to income vs spend / running gross margin.
- Cumulative mortality and culling rate, latest average weight, per-house summary, recording streak.
Bottom half: the nine tiles
Every feature is entered from here, and only three tabs remain along the bottom (Home / Flocks / Settings).
| 1 Daily Log Losses, notes | 2 Weight Curve Sampling, vs standard | 3 Feed Deliveries Loads, FCR |
| 4 House Environment Temperature, humidity, assessment | 5 Vaccination Plan Vaccines, reminders | 6 Medication Log Product, withdrawal |
| 7 Business Overview Costs, margin | 8 Harvest Planner Sell today or grow on | 9 Reports & Recap PDF, settlement |
- The number in the corner is the workflow order. Work through roughly in that order and you will be right; the order never changes.
- The coloured tag top-right is what genuinely needs doing today: not logged, due today, overdue.
With nothing pending, no tag appears.
4. Feature by feature
1. Creating a flock and running multiple houses
- Create the flock before the chicks arrive: "Create your first flock" on the home screen, or the "+" button at the bottom right of the flock list.
- Choose the breed (AA+ / Ross 308 slow-feathering / Cobb 500), the contract mode (spot market / guaranteed price), sex, placement date and planned days on feed (35 by default, adjustable 30–50).
- One house by default; tap "Add house" for more, each with its own name and bird numbers, and the total placement figure adds itself up.
- Chick overage defaults to 2%, and the actual number placed includes the overage automatically.
- The flock list can be filtered and sorted; press and hold to delete (which also clears every record linked to that flock).
2. Logging daily losses (tile 1)
- Enter deaths and culls, with a note if you want one.
- With more than one house, switch house at the top; houses already entered are ticked and the header shows "N of M houses entered today".
- One record per house per day. Entering again simply updates today's record — nothing is double counted.
- Auto-save: it saves the moment you stop typing, and saves first whenever you switch house, change date or leave the page, so nothing is lost to a forgotten Save button.
- Use ◀ ▶ or the calendar at the top to go back and fill in a missed day (anywhere between placement day and today).
- "Loss history" shows the whole flock week by week; days with nothing entered are flagged, and you can tap straight in to fill them.
- The recording streak counts up, and you get a reminder the evening before it is about to break.
Voice entry: in the house, with dirty hands, tap the microphone at the top right. Say "three dead, one culled" or "two dead two culled" and it understands either. The recognised numbers are shown for you to confirm and are only written once you tap Apply. Speech recognition is provided by the phone's own system; the app stores only the figures you confirm.
3. Weighing and the growth curve (tile 2)
- Weigh once a week for best results; large keys make entering each bird's weight quick.
- Mean weight, CV and uniformity grade are calculated automatically, and cumulative feed consumed can be entered at the same time.
- The "Growth curve" overlays your actual weights on the official standard line for the breed: the green dashed line is the standard, the orange solid line is your flock.
- With multiple houses, each house is weighed separately and has its own curve.
4. Feed deliveries (tile 3)
- When a load arrives, enter the kilograms from the delivery note; the money can follow later (it is marked "amount not entered" until then).
- One record per load, with the feed phase assigned automatically by day-age (starter / grower / finisher).
- Cost, cumulative feed consumed and estimated FCR (cumulative feed delivered ÷ total live weight, including what is still in the bin) all update in one pass.
5. House environment and assessment (tile 4)
Enter the house once (top right): length, width and height in metres, whether it has a ceiling, and how many fans of what diameter. A rated airflow figure from the fan plate (CMH) makes it more accurate.
After that, just log the temperature on each walk-through: humidity and air speed can be left blank, and you can log as many times a day as you like.
What the app works out for you:
| Assessment | Basis |
|---|---|
| Target temperature band | Age curve (33°C at day 0 → 20°C from day 35), tolerance ±1.0°C to 14 days of age, ±1.5°C thereafter |
| Effective temperature | Wind chill from air speed (counted only after 3 weeks of age; 3 m/s is worth roughly 7°C) |
| Whether air speed is adequate | Recommended air speed band for the day-age |
| Whether ventilation is adequate | 0.6 minimum, 6.0 m³/hr per kg of live weight in hot weather |
| Stocking density | Two thresholds, 33 and 40 kg/m² |
Every line states the measured value against the target value, and where there is a problem it gives a specific action. The assessment is rule-based and all the rules are written out indocs/ENVIRONMENT_ASSESSMENT_SPEC.md, so a vet can check them line by line and disagree with them — there is no black-box AI in here.
⚠️ This is whole-house temperature. Under spot brooders it will be warmer, and the assessment does not replace watching the birds: huddling means cold, panting and spreading out means hot. The birds have the final say.
When you create the next flock, the hardware details for a house of the same name are carried over, so there is nothing to re-enter.
6. Vaccination programme and reminders (tile 5)
- Fill in your usual programme once under "Settings" → "Vaccination plan template". A standard Taiwanese programme is built in:
- Days 1–3: ND+IB live in the drinking water, plus ND+IBD inactivated by injection
- Days 11–14: booster
- Day 21: live booster in the drinking water
- Vaccine options: ND+IB, ND, IB, IBD, ND+IBD, ND+IB+IBD, REO. (Taiwanese broilers are not vaccinated for avian influenza, and ILT and fowl pox are not used, so they have been removed.)
- Three routes to choose from: live in drinking water / live by spray / inactivated by injection.
- Several vaccines can be scheduled on the same day; the template can be added to, trimmed, re-dated, or have individual items switched off.
- When the flock is created, the programme is scheduled to real dates from the placement day (placement day counts as day 1).
- Tick items off as they are done, mark items you are skipping for this flock, and overdue items are flagged in red.
- A notification at 7 pm the evening before, so nobody forgets to make the solution up or book the vet.
7. Medication log and withdrawal periods (tile 6)
- Enter product names yourself (the app ships with no drug list; anything you have entered before appears in the picker next time).
- Record the starting day-age, how many consecutive days, and the dose (ppm or dilution ratio, whichever you work in).
- The important field is the withdrawal period in days. Once entered, the app calculates the earliest permitted catching date:
- Earliest catching date = last day of treatment (the actual completion date for treatments already finished) + withdrawal days
- The harvest planner blocks it in red: "Withdrawal not cleared: birds cannot go out before
[date]", so nothing is caught inside the withdrawal period.
- Routine treatments can be set up under "Settings" → "Medication plan template" and are carried into new flocks automatically; a one-off treatment can simply be added to the flock as it happens.
- The same 7 pm reminder applies the evening before.
8. Business overview (tile 7)
Four tabs:
Actual settlement — every cost line: chicks, feed, vaccines, medication, utilities, litter, cleaning and disinfection, labour and so on. As the birds go out, record each load (birds, total weight, unit price) and the income is calculated for you. Gross margin, ROI and cost per bird update immediately.
Margin calculator — enter live weight, FCR and feed price and get margin per bird straight away.
- Supports both spot market and guaranteed-price contracts; the guaranteed price tracks the feed price 1:1, and the settlement price can also be overridden by hand.
- Eight industry association levies are built in (NT$14.32 per bird in total — these are specific to
Taiwan); each can be re-costed, switched off, or added to.
- The sensitivity table underneath shows what live weight × FCR does to profit.
Net profit — production income, direct costs, operating expenses and other income are listed in tiers and every tier opens up to the detail.
- Labour and fixed costs are apportioned over the flock cycle (days on feed plus empty-house days), and the proportion is adjustable.
- It works through to total cost per bird and net profit per bird, using the number of birds actually caught as the divisor.
- Two net profit figures are shown side by side: broiler production alone, and production including solar.
Detail — the cost list and the catching list, editable line by line.
9. Harvest planner (tile 8)
"Sell today, or grow on a few more days?"
- Your current deviation from standard is projected forward along the breed curve, listing for today and for +1 / +2 / +3 / +5 / +7 days: projected average weight, projected live birds, revenue, the extra feed cost, and the difference against selling today.
- Live-bird price is pre-filled from the last load and feed price from the delivery average; both can be changed.
- The best date is tagged "Suggested".
- Every assumption can be opened and checked: the deviation percentage, how losses are projected, how feed intake is projected, and whose price was used.
- At least one weigh-in after 14 days of age is required before it will calculate.
- Blocked in red if the withdrawal period has not cleared.
This is decision support, not a promise. Contract growers should work to their contract terms.
10. Reports and recap (tile 9)
- Export the PDF settlement report from the top right of "Business overview": production, costs, income, net profit with per-bird figures, and the growth curve.
- Before sharing, the app lists the sensitive information the report contains (farm name, unit prices and so on) so you can check once more, and then shares by email, messaging app or cloud drive.
- Once the flock is finished there is a flock recap summarising how it performed.
11. Problem diagnosis
Six classes of problem are detected automatically, against Aviagen standards:
| Problem | Trigger |
|---|---|
| High early losses | More than 2% in the first week (days 0–7) |
| Cumulative losses above target | Above the recommended threshold for the age in weeks |
| Late losses accelerating | Daily losses rising clearly after 28 days (heat stress / ascites / sudden death syndrome) |
| Body weight behind standard | Mean weight below 90% of standard |
| Feed efficiency deteriorating | FCR more than 0.10 above standard |
| Poor flock uniformity | CV above 12% (the Aviagen "Poor" band) |
Each one comes with likely causes, a checklist to work through in the house, and whether to call the vet — 22 rules in all; the full list is in section 11.
They can be cleared: each item can be set to "stop reminding me for this flock", "stop reminding me for all flocks", or "pin to the top". Anything switched off can be brought back at any time under "Settings" → "Muted alerts".
12. Settings
| Section | Contents |
|---|---|
| PDF report header | Farm name, owner's name |
| Language | Traditional Chinese / English |
| Theme | Change the colour scheme; data and control positions are unaffected |
| Smart reminders | Weigh-in Saturday 08:00, day before catching 07:00, recording streak 21:00; all scheduled on the device, nothing sent to a cloud |
| Staff | Monthly salary → employer's labour insurance, health insurance, pension and occupational-injury contributions calculated automatically (2026 official Taiwan brackets) |
| Farm-level fixed costs | House rent, loan interest and so on; empty-house days live here too (25 by default) |
| Solar income | Enter the month and the amount; prorated across the days the flock occupies |
| Vaccination / medication plan templates | Set up your usual programmes; carried into new flocks automatically |
| Muted alerts | Restore reminders you have switched off |
| On-device backup | Export / restore JSON |
| Onboarding | Replay the five onboarding screens |
| Security and privacy | Information page |
| User guide | The full in-app guide (14 sections) |
5. Notifications at a glance
| When | What |
|---|---|
| Every Saturday 08:00 | Time to weigh |
| 07:00 the day before catching | Birds go out tomorrow |
| Every day 21:00 | Recording streak about to break |
| 19:00 the evening before a scheduled vaccination | Which vaccine tomorrow, and by which route |
| 19:00 the evening before a scheduled treatment | Which product to give tomorrow |
All of it is scheduled on the phone itself and passes through no server. It can be switched off in Settings.
6. Data and privacy
- Your data lives on your phone only. No server, no account, no login.
- Before changing phones or wiping one, always export a JSON file under "Settings" → "Backup" and keep it wherever you choose.
- "Restore" overwrites everything currently in the app, so export a copy before you run it.
- The backup file is plain JSON. You can open and read it yourself; it is not an encrypted black box.
- No personal data, no location, no advertising identifier, no advertising, no third-party analytics.
- Voice entry uses the phone operating system's own speech recognition. The app stores only the numbers you confirm, never the audio.
7. Trial and subscription
- 40-day free trial with full, unrestricted use, no payment up front and no card details required.
- The trial starts the day you create your first flock, not the day you install. Time spent reading up or waiting on placement does not eat into it — install and leave it alone and nothing counts down.
- After that, NT$399 per month, with no lock-in and cancellation any time through the App Store.
- After cancelling or expiry the app becomes read-only. The data is still on the phone and can be read and exported; you simply cannot add to it.
- New features and updates arrive throughout the subscription, with no advertising and no paid add-ons.
- The price shown in the App Store is the one that applies. The iOS app is now on the App Store and can be downloaded straight away.
8. Glossary
| Term in the app | What it means |
|---|---|
| Flock | One full cycle, from chick placement through to the last bird caught (a batch or crop) |
| House | One of the houses a single flock is split across |
| Losses | Mortality plus culling combined |
| Uniformity / CV | How widely bird weights are spread; the smaller the CV, the more even the flock |
| FCR | Feed conversion ratio — kilograms of feed per kilogram of live weight gained |
| Deviation | Your actual body weight ÷ the breed standard body weight |
| Withdrawal period | The days that must pass between the last treatment and catching |
| Empty-house days | The days between the last bird out and the next placement (used to apportion fixed costs) |
9. Frequently asked questions
Q: Does it work with no signal?
Yes. Everything runs offline; only sharing a PDF needs a connection.
Q: Will I lose data if I forget to hit Save?
The daily log saves itself. Other forms prompt you before you leave.
Q: How many times a day can I log the environment?
As often as you like. The assessment uses the latest reading, and the day's high, low and day-night difference are shown separately.
Q: Is "day 1" of the vaccination programme placement day or the day after?
Placement day counts as day 1.
Q: With several houses, how is average weight calculated?
The home screen shows the weighted average across the whole farm; the per-house summary shows each house's own figures.
Q: What do I do when I change phones?
On the old phone, "Settings" → "Backup" to export the JSON; install on the new phone and use "Restore".
Q: When does the trial start counting?
Forty days from the day you create your first flock. Install it and leave it and nothing counts down.
Q: Can the sample tour mess up my own records?
No. It runs on a separate store that is discarded the moment you leave the tour. It is never written to your database and never appears in a backup.
Q: If the trial ends and I do not subscribe, do I lose the data?
No. The app becomes read-only: everything stays visible and exportable, you simply cannot add or edit. Subscribing restores it at once.
10. In development: farmhand reporting
Today it is one phone per farm and the owner does the recording. A later release will add farmhand reporting so the people in the houses can record too:
- The farmhand installs the same app, picks "I am a farmhand", and scans the flock QR code the owner provides. That is the whole setup.
- The farmhand side holds only daily losses, weigh-ins, environment and notes. Cost, contract and profit fields do not exist on that phone at all.
- At the end of the day they tap "Report", which produces that day's sheet to send over LINE. No account, no sign-in, nothing through a server.
- The owner taps the file and lands straight in the app on a preview — which houses are new, which figures are updates — and nothing reaches the books until they confirm.
- If a figure changes later in the day, the farmhand simply reports again and the newer sheet supersedes the older one. Tapping the same file twice never double-counts. Figures the owner edited by hand stop and ask rather than being overwritten.
- The farmhand side is free. One subscription, the whole farm can record.
This is planned for a later release; the final scope and timing are set by what actually ships.
11. Anomaly rules in full (22 rules)
This section lays out every anomaly rule built into the app so that veterinarians, feed and animal-health suppliers can audit them line by line. Each of the six anomaly classes has one trigger; once triggered, all 3–4 “possible causes” under that class are shown together with an on-farm checklist and a note on whether a vet is needed, for the farm to rule out one by one. The rules are based on the Aviagen handbooks and general poultry veterinary knowledge and are for reference only; real cases must be assessed by a licensed veterinarian.
This section is generated from the app source, so the wording matches what the app shows. Corrections and additional rules are welcome.
The six triggers
| Class | Trigger | Severity |
|---|---|---|
| Early mortality high | Cumulative mortality on days 0–7 ÷ placed > 2.0% | > 4.0% critical; > 3.0% warning; otherwise watch |
| Cumulative mortality high | Cumulative mortality above the age threshold: ≤7d 2.0%, ≤14d 3.0%, ≤21d 4.0%, ≤28d 5.0%, ≤35d 6.0%, ≤42d 7.0% (7.0% beyond 42d) | Excess > 3.0 pp critical; > 1.5 pp warning; otherwise watch |
| Late-stage mortality spike | Average daily mortality from day 28 > 0.15%/day | > 0.40% critical; > 0.25% warning; otherwise watch |
| Weight behind standard | Latest mean weight ÷ breed standard < 0.90 | < 0.80 critical; < 0.85 warning; otherwise watch |
| Feed conversion deteriorating | Measured FCR − standard FCR > 0.10 | > 0.30 critical; > 0.20 warning; otherwise watch |
| Flock uniformity poor | Weight CV at the latest weighing > 12% | > 16% critical; > 14% warning; otherwise watch |
Early mortality high (4 rules)
1. Poor chick quality (transport stress / breeder-flock metabolic history)
Aviagen Handbook §1 — Chick Quality and Brooding
- Are navels healed properly on arrival?
- Are chicks standing and active uniformly?
- Are 24-hour deaths concentrated in specific boxes?
- Has the breeder farm reported any recent disease?
Vet: If 24-hour mortality exceeds 1%, contact a vet and refrigerate (do not freeze) 5–10 fresh carcasses for testing.
2. Improper brooding temperature (too cold or hot) causing huddling or dehydration
Aviagen Handbook §2 — Environmental Management (Temperature)
- Is brooding temperature 32–34℃ on d1–3?
- Are chicks huddling near heat source (cold) or scattering away (hot)?
- Does temperature drop sharply at night?
- Is humidity within 60–70%?
Vet: Temperature issues do not need a vet — adjust equipment first; persistent mortality means rule out yolk sac infection.
3. Poor drinking-water management (pressure / quality / insufficient training-to-drink)
Aviagen Handbook §3 — Water Quality and Management
- Is drinker line height level with chicks' back height?
- Does water flow immediately on trigger contact?
- Was 100% training-to-drink completed within 4 hours of arrival?
- Is water quality (total bacterial count / nitrates) within standard?
Vet: Send a water sample to a local animal health lab — low cost and fast turnaround.
4. Yolk sac infection (omphalitis) — breeder-farm / hatchery contamination
Aviagen Handbook §1 — Hatchery Hygiene
- On necropsy, is the yolk sac unabsorbed / discolored black or greenish-gray?
- Is the navel area red, swollen, or scabbed?
- Are similar cases occurring across multiple houses in the same batch?
- Has the hatchery recently changed its cleaning procedures?
Vet: Report to the breeder farm/hatchery and submit 5–10 fresh carcasses for bacterial culture (commonly E. coli / Salmonella).
Cumulative mortality high (4 rules)
5. Disease outbreak (coccidiosis / necrotic enteritis / IBD / ND / IB)
Aviagen Handbook §6 — Health and Biosecurity
- Are droppings bloody (coccidiosis) or red-brown intestinal mucosa (NE)?
- Any respiratory sounds / coughing / watery eyes?
- Neurological signs (twisted neck / paralysis)?
- Is the bursa of Fabricius swollen (IBD)?
Vet: On any suspected disease sign, immediately contact a vet and isolate suspected birds; submit 5–10 live birds or fresh carcasses for testing.
6. Management issue (stocking density too high / insufficient ventilation / excess ammonia NH3)
Aviagen Handbook §2 — Environmental Management (Ventilation, Density)
- Is stocking density ≤ 30 kg/m² (commercial broiler recommendation)?
- Does ammonia irritate your nose on entering the house?
- Is litter damp or caking?
- Does ventilation keep CO2 below 3000 ppm?
Vet: Management issues do not need a vet, but NH3 > 25 ppm damages respiratory mucosa and accelerates disease.
7. Vaccine failure (cold-chain break / inaccurate dosing / maternal antibody interference)
Aviagen Handbook §6 — Vaccination Programmes
- Was the vaccine kept at 2–8℃ from purchase through administration?
- Was water vaccination completed within 2 hours using dechlorinated water?
- Was it administered during the appropriate maternal-antibody decline window (check serum antibody titers)?
- Does vaccine efficacy vary significantly between houses in the same batch?
Vet: If vaccine failure is suspected, a vet can draw blood for ELISA / HI antibody titer testing before deciding whether to re-vaccinate.
8. Bacterial biofilm contamination in water lines causing chronic toxicity / sporadic enteric infection
Aviagen Handbook §3 — Water Line Sanitation
- How often are water lines cleaned (recommended: between every flock plus a mid-cycle clean every 2 weeks)?
- Is the bacterial count at the line end below 100 CFU/mL?
- Has expired or excess acidifier caused line corrosion?
- Is the water tank enclosed and shielded from direct sunlight (to prevent algae)?
Vet: Sample water at the line end (not the source) and test with ATP fluorescence or bacterial culture.
Late-stage mortality spike (3 rules)
9. Heat stress (summer / insufficient ventilation / high metabolic heat from heavier birds)
Aviagen Handbook §2 — Hot Weather Management
- Is daytime house temperature above 28℃?
- Are birds panting / holding wings away from the body?
- Has water intake risen sharply while feed intake dropped?
- Has there been a power outage or fan failure?
Vet: Address the environment first for heat stress (misting / open curtains / more fans); sudden collapse and death may indicate ascites.
10. Ascites (high altitude / high-density rapid growth) or sudden death syndrome (SDS)
Aviagen Handbook §5 — Metabolic Disorders
- On necropsy, is there yellow fluid in the abdominal cavity (ascites)?
- Are most deaths large males that collapsed suddenly (SDS)?
- Has feed been changed or gone off frequently?
- Is growth rate unusually fast (consider reducing feed energy)?
Vet: Ascites/SDS is usually linked to excessive growth rate — consider feed restriction or lower feed energy from d21+; confirmation requires veterinary necropsy.
11. Leg problems (tibial dyschondroplasia TD / bacterial arthritis / lameness)
Aviagen Handbook §5 — Leg Health
- Are large numbers of birds squatting and not rising?
- On necropsy, is there a translucent cartilage mass at the proximal tibia (TD)?
- Are joints swollen or discharging yellow-white exudate?
- Is litter too hard or too wet, affecting standing?
Vet: Leg problems after d28 often cause death because birds "can't stand to reach feed" — have a vet culture joint exudate.
Weight behind standard (4 rules)
12. Feed quality issue (insufficient nutrition / mycotoxins / wrong-age formulation)
Aviagen Handbook §4 — Nutrition (Feed Specifications)
- Is the feed stage matched to age (starter / grower / finisher)?
- Is the feed damp, clumped, or rancid-smelling?
- Does intake match Aviagen recommendations for this age?
- Has the feed brand changed recently?
Vet: If mycotoxins are suspected, send a feed sample to a lab (zearalenone / aflatoxin B1).
13. Subclinical disease (coccidial carriage / early necrotic enteritis) not yet showing overt signs
Aviagen Handbook §6 — Subclinical Health Issues
- Are droppings watery or containing undigested feed?
- Do birds have rough feathers or dull eyes?
- Is water intake abnormally high (poor gut absorption)?
- Has there been a recent vaccine reaction?
Vet: For suspected subclinical issues, have a vet perform fecal microscopy plus gut lesion scoring (0–3).
14. Improper lighting program (continuous 24L suppressing appetite / light intensity too low to see feeders)
Aviagen Handbook §2 — Lighting Programme
- Is there a 4–6 hour dark period after d7 (for rest and hormonal balance)?
- Is light intensity at feeder height ≥ 20 lux after d7?
- Are bulbs dusty or malfunctioning?
- Is the dark period fully sealed with no light leaks?
Vet: Lighting does not need a vet, but prolonged 24L raises SDS risk; a common mistake in Taiwan is staying on 23L:1D past d7.
15. House temperature too low (especially at night/early morning) — energy diverted to maintaining body temperature
Aviagen Handbook §2 — Temperature by Age Curve
- Does house temperature follow the age curve (d14 ≈ 27℃ / d28 ≈ 22℃ / d35 ≈ 20℃)?
- Is there a record of sharp night-time temperature drops?
- Are birds huddling at night?
- Is effective temperature (wind speed + humidity, not just the thermometer) being considered?
Vet: Temperature issues do not need a vet, but weight lag alongside cold stress should rule out respiratory disease (cold drafts → chronic tracheitis).
Feed conversion deteriorating (4 rules)
16. Feed wastage (incorrect feeder height / pecking / rodent damage)
Aviagen Handbook §4 — Feed Management & Equipment
- Is feeder height level with the birds' backs?
- Is a large amount of feed scattered on the floor under feeders?
- Are there signs of rats / sparrows / wild birds entering?
- Is feeder design appropriate for this age (automatic vs. manual)?
Vet: Feed wastage usually does not need a vet; if high FCR is paired with weight lag, consider subclinical disease.
17. Subclinical gut issues (coccidiosis / NE / enteritis)
Aviagen Handbook §6 — Gut Health
- Are droppings orange-red or blood-tinged?
- Is intestinal content watery?
- Has probiotic or anticoccidial use recently decreased?
- Is litter damp (an early sign of gut problems)?
Vet: Gut lesion scoring (Johnson & Reid) is a low-cost early diagnostic a vet can complete in a single visit.
18. Temperature stress (cold raises energy use / heat suppresses feed intake)
Aviagen Handbook §2 — Thermal Comfort
- Is house temperature within ±2℃ of the target for this age?
- Is the day–night temperature swing greater than 5℃?
- Does the feed intake curve show irregular stalls?
- Is the water-to-feed intake ratio above 2.0 (a heat-stress indicator)?
Vet: Add evaporative cooling for heat stress, insulation for cold stress. FCR is highly temperature-sensitive — each 1℃ deviation adds roughly 0.02–0.05 to FCR.
19. Poor feed physical form (uneven particle size / high fines / poor pellet hardness)
Aviagen Handbook §4 — Feed Physical Form
- Is pellet durability index (PDI) below 10% (target for pelleted feed)?
- Is there heavy fines buildup at the bottom of feeders?
- Is pellet diameter (d28+) 3–3.5 mm?
- Has the feed mill or formulation changed recently?
Vet: High fines cause selective feeding and worsen FCR; no vet needed, but discuss pelleting quality with the feed supplier.
Flock uniformity poor (3 rules)
20. Insufficient feeder/drinker space causing competition (weaker birds can't get access)
Aviagen Handbook §2 — Equipment Spacing
- Is feeder count sufficient (one pan per 65 birds)?
- Is drinker count sufficient (one bell drinker per 100 birds)?
- Is there a visible split into "large" and "small" subgroups?
- Is house temperature/ventilation even (corner birds falling behind)?
Vet: Adding feeder/drinker space usually improves this within 1–2 weeks; consider regrouping if the split persists.
21. Mixed chick source (different breeder flocks / different set dates)
Aviagen Handbook §1 — Chick Source Consistency
- Do all chicks come from the same breeder flock?
- Is chick set age consistent (within 24 hours)?
- Is arrival body-weight CV already above 8%?
- Does the breeder farm provide a distribution report?
Vet: This is best prevented at the source — request same-batch, same-age chicks from the breeder farm next time.
22. Uneven in-house microenvironment (cold corners / ventilation dead zones / uneven lighting)
Aviagen Handbook §2 — House Climate Uniformity
- Does the temperature spread across the 4 corners plus center (5 points) exceed 2℃?
- Are there ventilation dead zones (areas birds avoid)?
- Is light distribution even (corners < 50% of center)?
- Are feeders/drinker lines more than 3 m from corners?
Vet: Uneven microenvironments are usually found with a smoke test for airflow — no vet needed, just equipment calibration.
*ChickMoney · built by someone who has actually worked in the Taiwanese broiler industry*