At a glance. Compare air and floor measurements with chick behaviour and the breeder guide when preparing a poultry house and adjusting brooding conditions.
Most poultry houses have one thermostat, hung at a convenient height, and most managers trust its number completely. But a chick does not live where the thermostat hangs — it lives on the floor, where its bare feet, legs, and belly are in constant contact with the litter. If the air reads a comfortable 32°C but the floor is a cold 24°C, the chick is chilled no matter what the display says. Understanding house temperature by bird age, and specifically why floor temperature outranks air temperature, is what separates a strong start and a smooth grow-out from a flock that never quite recovers from its first cold night.
Two Thermometers, Two Different Stories
Air temperature and floor temperature are related but not the same, and the gap between them is where problems hide.
- Air temperature is what a wall thermostat reads and what most controllers manage.
- Floor (litter surface) temperature is what the birds actually feel through their feet and body.
- On a cold concrete slab, floor temperature can lag air temperature by several degrees for hours after heaters come on.
For young birds especially, the floor number is the real number. Manage it directly and the air follows.
Placement Targets: Air Around 30–35°C, Floor at Least 32°C
At chick placement the whole house should be warm, but the litter must be warm before the birds ever arrive.
- Target house air of about 30 to 35°C at placement.
- Bring the floor to at least 32°C, which usually means pre-heating the house for a day or more so the slab and litter have time to warm through.
- Cold litter pulls heat out of chicks faster than cold air, because contact conduction is far more efficient than air convection.
Pre-heating is not optional in cold weather; it is the only way to get the floor to temperature before placement.
Ross-Style Zone Targets at Brooding
Breeder guides give slightly different numbers for different zones of the brooding area, which is a reminder that "house temperature" is really several temperatures:
- Whole-house air around 30°C.
- Brooder or house edge closer to 32°C.
- Litter surface in the range of 28 to 32°C.
The pattern is consistent across guides: the litter should be as warm as, or warmer than, the general air, so a chick standing still is being warmed from below rather than losing heat to the ground.
Read the Chicks, Not Just the Gauge
Chick behaviour is the most reliable thermometer in the house, because it integrates air, floor, and draft into one signal.
- Evenly spread, active, feeding chicks — temperature is right.
- Huddled in piles, chirping loudly — too cold, and almost always the floor is the culprit.
- Panting, wings spread, pushed to the edges — too hot.
- All crowded to one side — a draft is pushing them away from cold incoming air.
When the gauge says warm but the chicks huddle, trust the chicks and check the floor.
Chick Foot Temperature: A Field Test
A chick's feet are a direct read-out of floor temperature, and you can check them by hand.
- Pick up several chicks and press their feet gently against your neck or the inside of your wrist.
- Warm feet mean the litter is warm enough.
- Cold feet mean the floor is too cold, regardless of what the air thermostat says.
Cold feet in the first days slow gut development and yolk absorption, and the flock rarely makes up the lost ground. This one-minute test catches a problem no wall thermostat can see.
The Weekly Step-Down Through Grow-Out
After the first days, house temperature comes down on a schedule as the birds feather out and generate more of their own heat.
- Reduce house temperature gradually week by week, avoiding sudden drops.
- Keep daily changes small and let birds adjust; abrupt cold triggers piling and chilling.
- By the later weeks, broilers are comfortable at much cooler temperatures than at placement, because feathering and body mass make them far more cold-tolerant.
The floor-first principle relaxes as birds grow: once fully feathered, they sit on their own insulation and the air temperature becomes the dominant number again.
Layer and Pullet Comfort Zone
For growing pullets and laying hens past the brooding stage, the comfort target shifts to a mild, stable band rather than a warm one.
- Mature layers are most comfortable and productive in roughly the 18 to 24°C range.
- Within that band, feed intake, egg production, and shell quality hold steady.
- Above it, birds cut feed and lose production; below it, they eat more to stay warm and waste feed.
The floor matters less for feathered adult birds, but stable air temperature within the comfort band matters more, because production responds to every degree.
Why Cold Litter Costs So Much
The damage from a cold floor is out of proportion to how it looks, because it strikes in the window when it matters most.
- Chilled chicks divert energy from growth to staying warm.
- Cold guts slow yolk absorption and the uptake of that critical first feed.
- Chilled birds pile, and piling causes suffocation and uneven flocks.
- The gap opened in the first days widens across the whole grow-out.
A warm floor at placement is one of the cheapest, highest-return actions in the entire production cycle.
Measuring Temperature Where It Counts
To manage floor temperature you have to measure it where the birds are, not where the wire happens to run.
- Use an infrared or contact thermometer to read the litter surface, not just the air.
- Check multiple spots — under brooders, along walls, near inlets, and in corners.
- Watch for cold streaks under inlets and cold rings around the house edge.
A house has a temperature map, not a single temperature, and the birds find every cold spot on it.
Drafts: The Hidden Temperature Thief
A draft can chill birds even when both air and floor read correct, because moving air strips heat off them directly.
- Cold air falling from a poorly set inlet lands on the floor and chills both litter and birds.
- Birds react by moving away, revealing the draft as a cleared patch of floor.
- Managing inlets and static pressure keeps incoming cold air up at the ceiling where it can warm before dropping.
Temperature control and air control are the same job; you cannot fix one while ignoring the other.
A Practical Temperature Routine
A workable daily routine ties the numbers and the birds together:
- Pre-heat the house so the floor reaches at least 32°C before placement.
- Read litter-surface temperature in several zones, not just the wall thermostat.
- Do the chick-foot test in the first days.
- Watch bird distribution as your master signal — spread is good, piled or edged is not.
- Step temperature down gradually week by week as birds feather.
- Hold mature layers in the 18–24°C comfort band.
Bringing It Together
Temperature management by bird age is really two jobs: getting the floor warm for young birds and holding stable air for older ones. Bring the litter to 32°C or more before chicks arrive, verify it with the chick-foot test, and read the birds rather than trusting a single gauge. As the flock feathers, step the temperature down gently and let air temperature take over. Get the floor right early and the whole cycle runs smoother.
If you are planning a heating and brooding layout that gets the floor to temperature reliably in cold weather, our team can help you match heaters, controls, and house design to your climate and flock. Reach out and we will help you build a warm, even start every time.
Visual checklist
Related reading
Broiler Brooding: First-Week Environment and Access
Day-Old Chick Placement: First Feed and Water Access
Further reading
Use the management guide for the actual breed, age and housing system when selecting flock targets. Review changes with the farm team and the relevant nutrition, health or equipment specialist.
