Raising Baby Chicks: Brooder Setup and the First Weeks

Those first six to eight weeks decide more about your flock's long-term health than almost anything else you will do as a keeper. A chick that gets chilled, dehydrated, or crowded in week one carries that setback for months, sometimes for life. This guide walks through everything you need before the chicks arrive — the brooder itself, the heat source, feed and water, and the health checks that catch trouble early — then maps out what actually happens week by week until your babies are ready to move outside.

Setting Up the Brooder: Space and Walls

A brooder is simply a draft-free, enclosed space that keeps chicks warm, contained, and safe from pets. A large plastic tote, a livestock stock tank, or even a sturdy cardboard box works fine for the first week or two; you do not need anything fancy. Plan on roughly half a square foot per chick to start, and expect to double that by week four or five as they grow — a brooder that felt spacious on day one will feel cramped by week three if you do not plan ahead.

Walls matter more than most new keepers expect. Chicks can hop and flutter surprisingly early, often clearing a 12-inch wall by ten days old, especially when they are chasing each other or trying to perch on the feeder. Build or buy walls at least 18 inches tall, and if you are using an open-top tote, keep a screen or hardware-cloth lid handy once they start test-flying. Site the whole setup somewhere draft-free and out of reach of dogs and cats — a spare room, mudroom, or garage corner all work, as long as it stays above roughly 65 degrees Fahrenheit even overnight.

Heat: Plate vs. Lamp, and the Weekly Step-Down

You have two realistic choices for supplemental heat. A radiant heat plate sits low over the brooder floor and lets chicks walk underneath it, much like huddling under a hen; it runs cool to the touch on top, carries no fire risk, and does not flood the brooder with light around the clock, which helps chicks actually sleep. A heat lamp — typically a 250-watt bulb in a clamp fixture — throws more ambient warmth across a larger brooder and is the better choice in a cold garage, but it is also the single most common cause of brooder fires when it is not secured with two independent clips or chains. If you use a lamp, never rely on the clamp alone.

Whichever you choose, start the warm zone at about 95 degrees Fahrenheit for week one and step it down roughly 5 degrees per week: 90 in week two, 85 in week three, 80 in week four, and so on until you reach ambient room temperature around week six or seven, once the chicks are fully feathered. Do not trust the thermometer alone — watch behavior instead. Chicks piled directly on top of each other under the heat source are too cold. Chicks pressed flat against the far walls, panting, or holding their wings out from their bodies are too hot. Chicks spread evenly around the brooder, chirping softly and moving in and out of the warm zone on their own, have it right.

Bedding, Feed, and Grit

Pine shavings are the standard bedding choice: absorbent, cheap, and low-dust when you buy the coarser "large flake" grade. Avoid cedar shavings, whose aromatic oils can irritate a chick's developing respiratory system, and skip newspaper alone, which is slick enough to cause splayed legs in young chicks. Start with about two inches of shavings and top it off as needed rather than doing a full change every few days.

Feed an unmedicated or medicated chick starter feed (20–24% protein) from day one, offered free-choice in a dedicated chick feeder rather than a flat dish, which gets kicked full of bedding and droppings within hours. If chicks are eating only crumble starter, they do not need grit. The moment you offer anything else — a bit of scratch, a garden treat, or even the bedding itself if they start pecking at it — add a pinch of chick-sized grit to the feed so their gizzard can grind what they swallow. Raise the feeder and waterer slightly as the chicks grow, keeping the rim roughly level with their backs, which cuts down on wasted feed and contaminated bedding.

Water Safety: Preventing Drowning and Pasty Butt

Baby chicks drown more easily than people expect — a wet, chilled chick can lose coordination fast in even an inch of open water. Use a proper chick waterer or font with a narrow drinking trough rather than an open bowl, and if you are improvising with something wider, drop clean marbles or smooth pebbles into the reservoir so chicks can drink from the gaps without a fall in fully. Check the water two or three times a day; shavings, droppings, and spilled feed foul it constantly at this age. As chicks graduate from chick-sized equipment, a sturdy galvanized feeder and waterer set is worth setting up early so you are not scrambling to replace flimsy plastic gear at week four.

Pasty butt — droppings that stick and dry over the vent, blocking the chick from eliminating — is common in shipped or stressed chicks, especially in the first week, and it is fatal within a day or two if you miss it. Check every chick's rear morning and evening. If you find it, soften the blockage with a warm, damp cloth or cotton swab for a minute or two before gently working it free; never yank dried droppings off dry skin, since that can tear delicate tissue. A pinch of sugar or a proper poultry electrolyte in the water for the first 48 hours helps stressed or shipped chicks recover their appetite and usually clears pasty butt up within a few days as their gut settles.

The First Six to Eight Weeks: A Timeline

Hardening Off and Moving to the Coop

Hardening off is the gradual process of letting chicks adjust to outdoor temperatures before you cut the heat entirely. Once chicks are fully feathered — no more fluff visible on the head or neck, usually around five to six weeks — and overnight lows are consistently above 50 to 55 degrees, start with an hour or two outside in a secure, shaded, predator-proof pen on a mild afternoon. Add time and exposure over the following week, watching for shivering or huddling (still too cold for full-time outdoor life) versus panting with wings held away from the body (too warm, cut back).

Move chicks to the coop full-time once they are fully feathered and have handled several days of hardening off without distress. Set up feed and water in the coop before the move, and if you are combining young birds with an established flock, keep them visually separated for a week or two first so the pecking order settles gradually rather than through a single chaotic introduction. If you are still finalizing your coop and run specs, our complete start-to-finish flock guide walks through space, ventilation, and predator-proofing basics before the big move. And if you have not settled on which breeds you are raising yet, it is worth comparing options in our guide to beginner-friendly chicken breeds before you order chicks next time — some handle brooder life and hardening off noticeably better than others.

For keepers who want the whole process mapped out in one place, from ordering chicks through your first collected egg, The Complete Guide to Raising Backyard Chickens is a solid reference to keep on hand during those first eight weeks. We also keep our current brooder and coop gear recommendations updated on our best gear picks page, which is worth a look before you buy anything sight unseen.

FAQ

How long do chicks need a heat source? Most chicks need supplemental heat for five to seven weeks, stepping the temperature down about 5 degrees per week from a 95-degree starting point until they reach ambient room temperature. Fully feathered chicks — no down or fluff left on the head and neck — can typically handle life without a heat source as long as nighttime lows stay above roughly 50 degrees Fahrenheit.

Can I use a cardboard box as a brooder? Yes, for the first week or two a sturdy cardboard box works fine, as long as it is tall enough (at least 18 inches) to contain hopping chicks and is kept away from the heat source itself, since cardboard can scorch or catch fire if a lamp is positioned too close. Most keepers upgrade to a plastic tote or stock tank by week two or three as the chicks need more space.

What does pasty butt look like and how urgent is it? Pasty butt appears as dried or sticky droppings caked around a chick's vent, sometimes forming a hard plug that blocks elimination entirely. It is urgent — check every chick daily for the first week, and clean any blockage promptly with a warm damp cloth, since an unaddressed case can be fatal within a day or two.

When can chicks go outside for the first time? Brief, supervised outdoor visits in a warm, shaded, predator-proof pen can start as early as three to four weeks old on mild days, mainly for fresh air and enrichment rather than full-time living. Full-time outdoor life in an unheated coop should wait until chicks are fully feathered, usually five to eight weeks old depending on breed and season.