S4ag Poultry

Poultry

Poultry done well is one of the most land-healing enterprises on a small farm. Scratching, manure deposition, insect predation, and soil aeration — when managed with rotation — all feed the soil food web and set up the next crop or grazing pass. Done badly — over-concentrated, static, or without recovery time — poultry becomes a nitrogen-burn, compaction, and biology-killing problem. The difference between the two is almost entirely how you manage movement and density. This skill gives you the decisions to get that right, whether you're running a dozen hens or a commercial pastured flock.

How this skill works: Each sub-tool pauses at a Checkpoint to confirm the assumptions it is about to build on before producing output. A recommendation built on a wrong assumption wastes time and money — confirm the checkpoint before acting. Each sub-tool ends with Next steps — the skills worth running once you have acted on this one.

Expert Lineage

The thinkers whose frameworks underpin this skill — and what they specifically discovered that changes how you farm.

Joel Salatin — Pastured Poultry Systems Salatin developed the egg mobile and broiler tractor systems at Polyface Farm in Virginia and documented them in Pastured Poultry Profits. His specific finding: following cattle with chickens at the right lag time (three to four days after the cows leave) allows flies to lay eggs in the manure pats, then chickens scratch the pats apart and eat the larvae — breaking the fly cycle while depositing evenly-spread fertility. This "sanitation run" is one of the highest-leverage integrations in small-farm system design. The practical implication: poultry following ruminants is different in kind from standalone poultry — it is a biological pest management and fertility tool, not just bird production.

Harvey Ussery — Integrated Small-Scale Flock Ussery's The Small-Scale Poultry Flock is the most comprehensive reference for homestead and small-farm poultry. His core contribution: the integrated flock — birds that contribute to the farm system through compost, pest control, weed seed predation, and soil preparation — is more productive overall than birds managed purely for egg or meat yield. His documented finding: deep litter systems maintained over winter produce biologically active compost in the coop that, when turned out in spring, outperforms purchased compost for transplant establishment. The practical implication: the coop and the compost pile are the same asset.

Andy Lee and Pat Foreman — Day Range Systems Lee and Foreman's Day Range Poultry established the day-range model as a middle path between static housing and full mobile systems — birds have a permanent shelter but free-range during the day in rotated sections. Their documented finding: day-range birds on rotated pasture maintain pasture quality indefinitely, while continuously-ranged birds degrade the same area to bare dirt within two seasons. The practical implication: rotation interval, not stocking density, is the key variable in pasture-based poultry.

Elaine Ingham — Manure Concentration and Food Web Toxicity Ingham's soil food web research establishes a threshold effect: low-rate manure deposition feeds bacteria and fungi; high-rate concentrated manure exceeds the food web's processing capacity and becomes toxic — nitrogen burn, anaerobic conditions, and biology collapse. A poultry enterprise managed without rotation will always hit this threshold. The practical implication: every poultry management decision is a biology management decision — the question is not just "are the birds healthy?" but "what is this doing to the soil community?"

Gail Damerow — Poultry Health Fundamentals Damerow's The Chicken Health Handbook established that most common poultry health failures are management failures before they are disease failures. Her documented framework: respiratory problems trace to ventilation; laying problems trace to light, nutrition, or stress; parasitic loads trace to litter management and access to dry scratching areas. Her most actionable finding: good air flow at bird height (not roof level) prevents the majority of respiratory disease in enclosed flocks. The practical implication: house design is health design.

Temple Grandin — Stress and Handling Grandin's work on livestock handling and low-stress management applies directly to poultry — stressed birds have suppressed immune function, reduced production, and higher susceptibility to disease. Her specific contribution: prey animals (including poultry) respond to sharp contrasts in light, sudden movement, and novel objects as threat signals. A dark entry into a bright space triggers fear; gradual transitions do not. The practical implication: catching, handling, and moving birds in low-contrast, calm conditions reduces health impacts of management stress.

Which tool fits

Routing Decision

• Starting from scratch, unsure what kind of poultry enterprise to run → system-selection
• Have or want a pastured, mobile, or egg mobile system and need to make it work → mobile-systems
• Birds are sick or you want to prevent health problems → health-management
• Feed costs are too high or you want to reduce purchased inputs → feed-and-nutrition
• Want to use poultry in another enterprise — garden, orchard, or following cattle → integration
• Building or improving housing — ventilation, predator proofing, litter → housing
• Unsure where to start → system-selection first; it routes to the others

System Selection

Matches your context, goals, and resources to the right poultry enterprise and management model.

Before choosing equipment or breeds, settle the enterprise design. The system shapes every subsequent decision — housing, rotation, labour, and what the birds contribute to the farm.

Step 1 — Choose the production type:

Step 2 — Choose the system model:

Step 3 — Match to your situation:

Confirm these questions before finalising:

• Do you have ruminants? → egg mobile becomes the highest-leverage option.
• Is land limited? → day range or deep litter with compost focus.
• Is labour limited? → layers in a rotated paddock system, not broiler tractors.
• Is the climate wet and cold? → duck enterprise or deep litter layer system.
• Is this a primary enterprise or a support enterprise? → primary justifies capital; support should be low-cost, high-integration.

Checkpoint — confirm before finalising:

• What is the primary goal — eggs, meat, land healing, pest control, or income? The enterprise type follows from this.
• How many hours per week can realistically be spent on poultry management? Labour constraint determines system choice more than any other factor.
• Is there an existing ruminant grazing enterprise to integrate with?

A system chosen without confirming labour availability is the most common cause of poultry enterprises being abandoned or running badly.

Output:

POULTRY SYSTEM RECOMMENDATION

Production type: [layers / meat birds / dual purpose / ducks / turkeys]
System model: [static / fixed with rotation / day range / egg mobile / broiler tractors / deep litter]

Rationale: [2-3 sentences on why this fits the context]

Starting flock size: [number]
Housing footprint needed: [m² or ft²]
Land needed for rotation: [area]
Estimated setup cost: [low / moderate / high — with rough figure if known]
Weekly labour estimate: [hours/week]

Key risk to manage: [the one thing most likely to go wrong in this system]

Next steps:

• Run housing (within this skill) to design or assess housing for the chosen system.
• Run mobile-systems (within this skill) if a pastured or egg mobile system was selected.
• /s4ag-fencing — rotation-based systems require fencing infrastructure; plan it alongside the poultry system.

Mobile Systems

Designs and manages pastured poultry systems — egg mobiles, broiler tractors, and day-range rotations.

Mobile and pastured systems are where poultry enterprise and land management overlap. Managed well, they improve pasture, suppress parasites, and build soil biology. Managed badly — moved too infrequently, overstocked, or run on wet ground — they destroy what they're meant to build.

The three variables that govern pastured system success:

1. Stocking density — how many birds per area at any one time
2. Move frequency — how often the birds access fresh ground
3. Recovery period — how long the ground rests before birds return

These three interact. High density requires more frequent moves; more frequent moves can work with shorter recovery if density is low enough. The target is always: birds leave the ground before it shows bare patches.

Broiler tractors — design and management:

Broiler tractors are bottomless moveable shelters housing 25–75 Cornish Cross or slow-grow broilers. The tractor moves daily or every two days, giving birds fresh ground and leaving a narrow stripe of evenly-spread manure.

Cornish Cross birds grow to weight in 42–49 days. For continuous production, stagger batches every 3 weeks. Heritage and slow-grow breeds at 12–16 weeks allow more flexibility in batch timing and pasture recovery.

Egg mobiles — design and management:

The egg mobile is a moveable layer house that follows cattle or sheep in a grazing rotation. Birds follow the ruminants at a 3–4 day lag — long enough for fly larvae to develop in the manure pats, short enough that flies have not hatched and dispersed. Birds scratch pats apart, eat larvae, and spread the manure.

In a Salatin-style egg mobile, 100 laying hens follow 100 cow-days of grazing. Adjust ratio to your system — the principle is a stable ratio between grazing pressure and bird pressure.

Day range systems:

Fixed permanent housing with rotating day-access paddocks. Birds return to housing at night; paddocks are fenced in sections with electric netting rotated every 1–4 weeks.

Minimum 4 paddocks to achieve useful recovery time. 6–8 paddocks is better. Each paddock needs 60–90 days rest to recover fully in temperate climates; 30–45 days in fast-growing summer pasture.

Pasture quality threshold: if birds are grazing bare ground, the rotation is too slow or stocking density too high. Bare ground = biology-destroying compaction and nitrogen burn, not land healing.

Checkpoint — confirm before finalising:

• What species and production type? Broiler tractors and egg mobiles are different systems with different infrastructure.
• Is there a ruminant enterprise to integrate with, or is this standalone? The egg mobile only works in integration.
• What is the total land area available for rotation, and what is the target flock size? From these two numbers, paddock size and recovery period can be calculated.

Running a mobile system at the wrong scale — too many birds for the land area available — is the fastest way to convert a land-healing enterprise into a land-degrading one.

Output:

MOBILE SYSTEM DESIGN

System type: [broiler tractor / egg mobile / day range]
Flock size: [number of birds]
Land area for rotation: [total ha or acres]

ROTATION DESIGN
Number of paddocks/strips: [number]
Paddock size: [m² or ft²]
Move frequency: [daily / every X days]
Recovery period per paddock: [days]
Total rotation cycle: [days]

INFRASTRUCTURE NEEDED
Housing: [dimensions and type]
Fencing: [type and length]
Water: [system]

STOCKING CALCULATION
Birds per m² at any time: [number]
Pasture recovery achieved: [days — confirm adequate]

INTEGRATION NOTE (if applicable)
[lag time after ruminants; ratio of bird pressure to grazing pressure]

Next steps:

• /s4ag-fencing — electric netting and energiser specification for the rotation design.
• /s4ag-livestock — if integrating with cattle or sheep, the grazing rotation governs the poultry rotation.
• /s4ag-soil — assess the pasture biology before and after the first season to document whether the system is healing or degrading the land.

Housing

Designs or assesses poultry housing for health, safety, and system function.

Housing is the single biggest influence on flock health outside of feed. The most common poultry health failures — respiratory disease, Marek's, wet litter problems, predator losses — trace directly to housing design failures. Get the housing right before worrying about any other health intervention.

The four housing requirements in priority order:

1. Ventilation — the highest priority. Most poultry respiratory disease is caused by ammonia accumulation and humidity. Ammonia rises from wet litter. Birds breathe at litter level — they are more exposed than you are when you walk in. The target: no ammonia smell at bird height. If you can smell it, the birds are suffering.

• Ventilation openings must be positioned to create airflow at bird height without draughts directly on roosting birds.
• The rule: inlet area at sides + outlet at ridge = 1–2% of floor area per unit.
• In cold climates: use adjustable ventilation — close at night in winter, open in summer. Never sacrifice ventilation for warmth; sacrifice warmth instead.
• Signs of inadequate ventilation: wet litter, ammonia smell, eye discharge, respiratory sounds.

2. Predator protection. Poultry losses to predators are almost always housing failures. In order of vulnerability:

Chicken wire keeps chickens in. Hardware cloth (welded wire, 12–19mm mesh) keeps predators out. These are different materials with different functions — do not substitute one for the other.

3. Roosting and nesting.

4. Litter management.

Dry litter is healthy litter. Wet litter is the primary disease vector in most housed poultry operations.

• Deep litter system: add carbon material (straw, wood shavings, dried leaves) over the season; birds scratch and aerate; the microbial community breaks down the manure in place. When done well, this is composting in the coop — it produces heat in winter and biologically active material for the garden in spring.
• Litter moisture check: squeeze a handful — it should hold shape briefly, then fall apart. If it drips or stays compacted: too wet. If it is dusty: too dry (dust causes respiratory problems too).
• Wet spots: remove immediately, add dry carbon material, check for roof or drinker leaks.

Housing size guidelines:

Checkpoint — confirm before finalising:

• What climate — cold winters, hot summers, wet? Ventilation design and insulation need vary significantly.
• Fixed housing or mobile? Mobile housing has structural weight constraints that limit ventilation options.
• What predator pressure is present? Regional predator species determines which entry points to prioritise.

A housing plan written without knowing the climate or predator context will get the ventilation or the predator exclusion wrong — both cause significant losses.

Output:

HOUSING ASSESSMENT / DESIGN

System: [fixed / mobile / tractor]
Flock size: [birds]
Climate: [temperate / cold / hot / wet]

VENTILATION
Status: [adequate / inadequate]
Recommendation: [specific fix or confirmation]

PREDATOR EXCLUSION
Vulnerabilities identified: [list]
Recommendations: [specific fixes, priority order]

ROOST AND NEST
Roost space: [cm per bird — adequate or not]
Nest boxes: [number and ratio — adequate or not]

LITTER SYSTEM
Type: [deep litter / regular change / tractor bare earth]
Current condition: [dry / wet — and action if wet]

FLOOR SPACE
Per bird: [m²] — [adequate / overcrowded]

PRIORITY ACTIONS
1. [most urgent fix]
2. [second action]
3. [third action]

Next steps:

• Run health-management (within this skill) if housing problems have already led to health issues.
• /s4ag-fencing — run perimeter and electric protection alongside housing predator-proofing.
• Run mobile-systems (within this skill) if moving to a mobile housing design.

Health Management

Diagnoses common poultry health problems and routes to the right intervention — prevention first, treatment second.

Most poultry health problems are preventable management problems. Before reaching for any treatment, work through the management causes. Treating symptoms on a flock with a housing or nutrition problem will cost money and fail to solve the problem.

Step 1 — Identify the problem category:

Common conditions and management responses:

Respiratory disease (Mycoplasma, Newcastle, ILT, Aspergillus)

• First action: improve ventilation — this alone resolves the majority of mild respiratory cases.
• Aspergillus (fungal): caused by mouldy litter or feed. Remove source. Cannot be treated effectively — prevention is the only strategy.
• Bacterial respiratory (Mycoplasma, CRD): antibiotics are effective but create resistance; improve housing as priority.
• Newcastle disease (viral): notifiable in most jurisdictions; call vet immediately.

Coccidiosis

• Common in young birds (under 12 weeks), especially in wet conditions.
• Prevention: dry litter, good nutrition, gradual exposure to soil builds immunity.
• Treatment: amprolium (conventional) or toltrazuril. Do not treat hens in lay if eggs are for consumption — check withdrawal periods.
• Sustainable note: birds raised with access to soil develop coccidial immunity naturally; complete confinement until point-of-lay then sudden outdoor access produces most coccidiosis cases.

External parasites (red mite, northern fowl mite, lice)

• Red mite: nocturnal; lives in cracks and joins in housing, not on birds. Check by running a white tissue along roost joints at night.
• Treatment (housing): diatomaceous earth in cracks, pyrethrin spray, or spinosad products. Thorough housing treatment is more effective than treating birds.
• Fowl mite and lice: live on birds; visible around vent, under wings. Treat birds directly with dust bath access (dry ash + fine soil) as prevention; diatomaceous earth or pyrethrin dust for active infestation.

Internal parasites (worms)

• Floppiness, pale combs, weight loss in free-range flocks on established ground.
• Worming: fenbendazole (Panacur) is effective and widely available. Rotate active ingredients if retreating.
• Prevention: rotation prevents worm burden build-up — the primary case for pastured systems.

Bumblefoot (Staphylococcus)

• Black scab on foot pad; caused by trauma, splinters, or hard landings from height.
• Mild cases: clean, antiseptic dressing, lower roost height. Severe cases: veterinary intervention.

When to call a vet:

• Multiple sudden deaths
• Neurological signs (circling, head tilt, paralysis)
• Any disease you cannot identify with confidence
• Notifiable disease suspicion (Newcastle, AI, Marek's in unvaccinated flock)

Checkpoint — confirm before finalising:

• How many birds are affected, and over what time period? A single sick bird and half the flock sick in 24 hours require different urgency.
• What is the housing and management system? Most health answers begin here.
• Are the birds vaccinated for Marek's, Newcastle, IB? This determines which diseases remain on the differential.

A health recommendation without knowing the housing and management context will miss the most common causes and reach for treatment when management is the answer.

Output:

HEALTH ASSESSMENT

Birds affected: [number / proportion of flock]
Onset: [sudden / gradual]
Primary symptoms: [list]

WORKING DIAGNOSIS: [condition]

MANAGEMENT CAUSE CHECK
[relevant management factors to address first]

TREATMENT RECOMMENDATION
Immediate: [action]
Product (if needed): [product, dose, route, withdrawal period]

PREVENTION / FOLLOW-UP
[what to change in management to prevent recurrence]

WHEN TO ESCALATE TO VET
[specific trigger signs for this case]

Next steps:

• Run housing (within this skill) if housing deficiencies are contributing to the health problem.
• Run feed-and-nutrition (within this skill) if nutritional deficiency or imbalance is a factor.
• /s4ag-pests — for broader IPM approaches to parasites affecting both poultry and land.

Feed and Nutrition

Decides on feed strategy — commercial, farm-mixed, or forage-integrated — and manages feed cost and quality.

Feed is the largest operating cost in any poultry enterprise and the single biggest lever on flock health after management. The goal is not necessarily the cheapest feed — it is the best nutritional outcome at the best cost, integrating whatever the farm can produce.

Nutritional requirements by class:

Commercial feed decision:

• For small flocks under 50 birds: commercial pelleted or crumbled feed is the most practical option. The nutritional formulation work is done.
• Choose organic where budget allows — conventional layer pellets contain coccidiostats and may contain ractopamine (US) or other growth promoters irrelevant to laying birds.
• Avoid mash for wet conditions — it spoils quickly and drives wet litter.

On-farm mixing: Cost-effective at scale (100+ birds) if grain is grown or available locally. A basic layer ration can be formulated from:

Whole grain scratch can be fed as up to 20% of the ration for birds with access to grit. Beyond 20%, it dilutes protein and drops production.

Farm forage contribution:

On good pasture in active growth, pastured layers can source 20–30% of their dry matter intake from forage and insects. This displaces purchased feed and improves egg nutritional quality (higher omega-3, higher vitamin E, deeper yolk colour from carotenoids). In winter, forage contribution drops to near zero.

Reducing feed cost — priority actions:

1. Weigh feed — most flocks are overfed, which depresses foraging behaviour and increases cost.
2. Layer hens: 100–120g commercial feed per day is adequate when birds have pasture access. 130–140g if confined.
3. Match feeding rate to production — adjust down in late lay and moulting, up when pullets approach lay.
4. Introduce fermented feed: soaking and fermenting grain for 48–72 hours increases digestibility, reduces feed consumption by 10–20%, and improves gut flora. Method: cover grain with water in a bucket, allow to ferment at room temperature, feed when slightly sour-smelling.

Checkpoint — confirm before finalising:

• What species and production stage are the birds? Protein and calcium requirements shift significantly.
• Is the goal to reduce cost, improve nutrition, or reduce purchased inputs specifically? These have different answers.
• What does the farm produce that could be integrated into the ration?

A feed recommendation for laying hens given to someone raising broilers, or a high-calcium layer ration fed to growing pullets, causes health problems rather than solving them.

Output:

FEED RECOMMENDATION

Bird type: [layers / broilers / ducks / etc.]
Stage: [starter / grower / layer / moulting]

DAILY RATION
Commercial feed: [g per bird per day]
On-farm supplement: [type and amount if applicable]
Forage contribution: [% of intake — season-dependent]

FORMULATION (if mixing on-farm)
[ingredient]: [%]
[ingredient]: [%]
...

ESTIMATED DAILY FEED COST: [£/$ per bird per day]

COST REDUCTION OPPORTUNITIES
[specific actions — fermented feed, forage, ration adjustment]

WATCH FOR
[nutritional deficiency signs specific to this ration and bird type]

Next steps:

• Run integration (within this skill) to maximise farm-grown forage contribution and reduce purchased feed.
• /s4ag-composting — fermented feed and deep litter both produce compostable material; close the loop.
• /s4ag-finance — calculate the gross margin on the poultry enterprise with current and optimised feed costs.

Integration

Integrates poultry into other farm enterprises — market gardens, orchards, rice paddies, and ruminant rotations — for land healing and input reduction.

Poultry earn their place in a diversified farm system most fully when they are doing at least two things at once: producing eggs or meat and doing useful biological work — pest control, fertility distribution, orchard sanitation, or soil preparation. This sub-tool designs those integrations.

The integrations worth considering:

Chicken tractors in market gardens

Move bottomless tractors across empty beds between crop cycles. Birds eat weed seeds, slug eggs, and soil pests; their manure fertilises the bed; their scratching breaks up surface crust.

• Move timing: after crop removal and before replanting. Birds should be on a bed for 5–10 days maximum before rest.
• Density: 4–6 hens in a 1.2m x 2.4m tractor, moved every 2–3 days across the garden.
• What they do: reduce wireworm, leatherjacket, slug egg, and cutworm populations significantly. Documented in Ussery and Coleman trials.
• Caution: do not run birds on beds within 90 days of harvest of low-growing crops (food safety contamination risk from fresh manure).

Ducks in orchards

Ducks are the better orchard integration than chickens — they are less likely to damage low-growing fruit and more effective against slug, snail, and grass-dwelling pest populations. They do not scratch as destructively as chickens.

• Stocking rate: 4–6 ducks per 0.1 ha of orchard; adjust to pasture recovery.
• Best season: spring through summer when slug pressure is highest.
• Caution: remove before soft fruit ripens at ground level — ducks will eat it.
• In wet orchards: ducks outperform chickens as they are wet-tolerant and more active in rain when slugs are mobile.

Ducks in rice systems (integrated rice-duck farming)

One of the most documented and productive integrations in Asian sustainable agriculture — ducks in flooded rice paddies eat insects, weeds, and molluscans; their movement aerates water; their manure fertilises; they eliminate the need for herbicide and significantly reduce pesticide use.

• Stocking rate: 10–15 ducks per 1,000m² of paddy.
• Timing: introduce ducklings 1 week after transplanting; remove before heading (ducks eat rice grain).
• Documented outcomes: comparable rice yield; elimination of herbicide; significant reduction in insecticide; duck sales as additional income.

Egg mobile following ruminants (Salatin system)

Described fully in mobile-systems. The integration principle: at 3–4 day lag, birds scratch manure pats, eat fly larvae, distribute fertility, and reduce the parasite burden from bovine manure — a biological pest control and fertility distribution service with egg production as a byproduct.

Poultry for land preparation (New ground)

Running a dense, short-stay poultry pen over new ground — especially weedy or scrubby areas — removes vegetation and weed seeds and prepares the seed bed without tillage. This is a standard technique in market garden establishment.

• Technique: run 20–30 birds in a 4m x 4m temporary pen; move every 3–5 days; birds will clear vegetation to bare soil within 3–5 days at this density.
• Follow immediately with cover crop or cash crop planting — do not leave bare soil uncovered.

Soil health framing for all integrations:

Every integration decision passes through the food web lens: the birds are depositing nitrogen-rich manure. The question is whether the food web can process it at the rate it is being deposited. Short-duration high-density followed by long recovery = biology healing. Long-duration moderate-density static = biology destruction. Rotation interval is the biological management variable.

Checkpoint — confirm before finalising:

• Which enterprise is being integrated with? Market garden, orchard, ruminant rotation, and rice all require different timing and stocking parameters.
• What is the recovery period available? The integration only heals land if the recovery is long enough.
• Is the other enterprise constrained by timing (harvest window, grazing rotation) that limits when birds can be present?

An integration timed incorrectly relative to the host enterprise — birds in the orchard when fruit is on the ground, or tractor on beds within 90 days of harvest — creates problems rather than solving them.

Output:

INTEGRATION DESIGN

Host enterprise: [market garden / orchard / rice / ruminant rotation / land preparation]
Integration type: [chicken tractor / duck orchard / egg mobile / land clearing pen]
Bird species: [chickens / ducks / both]
Flock size for integration: [number]

TIMING
Enter: [when birds arrive relative to host crop/rotation stage]
Exit: [when birds must leave]
Duration per area: [days]
Recovery before return: [days]

STOCKING PARAMETERS
Area per session: [m²]
Density: [birds per m²]

EXPECTED BENEFITS
- [benefit 1]
- [benefit 2]
- [benefit 3]

RISKS TO MANAGE
- [risk 1 — timing, density, or food safety]
- [risk 2]

FOOD SAFETY NOTE (if applicable)
[90-day rule or equivalent if near edible crops]

Next steps:

• /s4ag-soil — assess soil biology change in integrated areas over the season to confirm the system is building, not degrading.
• /s4ag-livestock — if integrating with ruminants, the grazing rotation governs the poultry timing.
• /s4ag-vegetables — for chicken tractor design integrated into a market garden rotation plan.