The best bedding absorbs moisture, controls odor, and breaks down into usable compost

The material you spread on the coop floor does three jobs at once: it soaks up droppings and spilled water so the birds stay dry, it reduces ammonia smell that builds up in enclosed spaces, and it eventually becomes compost you can use in a garden. Pine shavings, straw, and sand are the most common choices, and each has real trade-offs in cost, how often you change it, and what happens to it afterward.

What you choose depends on your climate, how many birds you have, and how much time you want to spend cleaning. A coop that stays too wet breeds disease and parasites. A coop that smells like ammonia means the bedding is saturated and the birds are breathing harmful fumes. The right material, changed on a schedule that matches your setup, prevents both.

Key Takeaways

  • Pine shavings are the most popular choice because they absorb moisture well, cost less than straw, and break down into garden compost within months.
  • Sand drains water when ready and never smells, but it does not break down and must be scooped daily like a cat litter box to stay clean.
  • Straw looks good and breaks down quickly, but it compacts when wet and does not absorb moisture as well as shavings, so it needs changing more often.
  • Cedar and walnut shavings smell pleasant but contain oils that irritate birds' lungs and should never be used, even though they are sold as pet bedding.
  • Most coops need bedding changed every one to three weeks depending on the material, the number of birds, and rainfall in your area.

Pine shavings: the standard choice for most backyard setups

Pine shavings are the most widely used coop bedding because they strike a balance between cost, absorbency, and what you can do with them afterward. They absorb moisture quickly, so the floor stays relatively dry even when birds spill water or it rains. A 4-cubic-foot bag costs between $5 and $10 at feed stores and covers a standard 4-by-8-foot coop to a depth of 3 to 4 inches.

The shavings break down over time and can be mixed into garden beds or compost piles. After three to six months in a pile, they turn into dark, crumbly material that improves soil. This means you are not just throwing away bedding—you are building something useful. Change the bedding every two to three weeks in a coop with four to six birds, or every week if you have more than eight birds in the same space.

The main drawback is that pine shavings compact when they get wet, especially at the bottom of the pile where droppings accumulate. Once compacted, they stop absorbing moisture and start holding it instead. This is why you need to stir the bedding once a week with a garden fork or rake, breaking up the wet clumps at the bottom and mixing them with the dry material on top. If you skip this step, the coop will smell like ammonia within days.

Sand: when ready drainage with daily maintenance

Sand drains water when ready and never absorbs odor the way organic bedding does. A coop bedded with sand smells clean because urine and water run straight through to the ground below. This makes sand the best choice if you live in a wet climate or if your coop sits on a concrete floor where water cannot drain away.

The trade-off is that sand does not break down, so you cannot compost it. Instead, you manage it like a cat litter box: scoop out the wet clumps and droppings daily, and replace them with fresh sand. Over time, the sand becomes compacted and saturated with urine, and you have to remove the entire layer and replace it—usually every four to six weeks. This is more labor than stirring pine shavings, but less labor than changing straw weekly.

Use coarse play sand or construction sand, not fine sand meant for sandboxes. Fine sand clouds up when birds dust-bathe and gets into their eyes and lungs. A 50-pound bag of coarse sand costs $3 to $5 and covers a 4-by-8-foot coop about 2 inches deep. You will need several bags on hand because you replace it more often than you would shavings.

Straw: quick breakdown but slower moisture absorption

Straw (the hollow stalks left after grain is harvested) looks attractive in a coop and breaks down faster than pine shavings—usually within two to three months. It is softer underfoot for the birds and makes the space feel more natural. A bale costs $4 to $8 depending on where you buy it.

The problem is that straw does not absorb moisture as well as shavings. When it gets wet, it compacts into a dense mat and stays wet for days. This creates the exact conditions that breed respiratory illness and parasites. You have to change straw every one to two weeks, sometimes more often in rainy weather. For a small backyard flock, this means hauling out wet straw and replacing it constantly.

Straw works better as a nesting box material than as floor bedding. Use it in the boxes where hens lay eggs, where it stays drier because the birds are not walking through it constantly, and change the coop floor itself with pine shavings or sand.

Materials to avoid: cedar, walnut, and treated wood

Cedar and walnut shavings are sold as pet bedding and smell pleasant, but they contain aromatic oils that irritate birds' respiratory systems. Chickens have sensitive lungs, and breathing cedar or walnut dust over time causes chronic coughing and respiratory disease. Do not use them even if they are cheaper or smell better than pine.

Treated wood shavings (pressure-treated lumber sawdust) contain chemicals used to prevent rot and should never go in a coop. These chemicals are toxic to birds and can leach into the ground and water. Stick to untreated pine shavings from feed stores, which are specifically sold for animal bedding.

How deep to spread bedding and when to change it

Spread bedding 3 to 4 inches deep on the coop floor. This depth gives the birds cushioning underfoot and gives the material enough volume to absorb moisture before it reaches the floor. If you spread it thinner, wet spots will reach the wood floor within days, and the wood will rot.

How often you change bedding depends on three things: the material, the number of birds, and the weather. Pine shavings in a coop with four to six birds need changing every two to three weeks if you stir them weekly. Sand needs scooping daily and full replacement every four to six weeks. Straw needs changing every one to two weeks. In wet weather, change everything more often—moisture builds up faster when it rains.

Watch for ammonia smell. If you open the coop door and the smell hits you, the bedding is saturated and needs changing when ready, regardless of the schedule. Ammonia is a sign that urine is not being absorbed and is pooling on the floor.

Setting up drainage so water does not pool under the coop

Bedding works best when water can drain away from underneath. If your coop sits on bare ground, water from rain and spilled waterers will soak into the soil naturally. If it sits on concrete or packed earth that does not drain, water pools under the coop and keeps the bedding wet from below.

If you have a concrete floor, drill drainage holes in the corners or along the edges so water can run off. If the ground is packed hard, loosen it with a shovel and add a layer of gravel underneath the coop before you add bedding. Gravel lets water drain through while keeping the bedding slightly elevated above standing water.

Slope the ground around the coop slightly away from the walls so rain runs off instead of pooling. Even a gentle slope makes a difference in how long bedding stays dry.

Frequently Asked Questions

Can I use hay instead of straw?

Hay contains seeds and mold spores because it is dried grass meant for animal feed, not bedding. It breaks down faster than straw but compacts even more when wet and molds quickly in damp conditions. Straw is better, but pine shavings or sand are still your best options for a dry coop.

What do I do with old bedding after I change it?

Pine shavings and straw can go into a compost pile or mixed directly into garden beds. Spread a 2 to 3 inch layer over soil and work it in with a shovel. It breaks down over the growing season and improves soil structure. Sand cannot be composted—either dispose of it or rinse it and reuse it if it is not too compacted.

Is it okay to use newspaper under the bedding?

Newspaper under bedding traps moisture and prevents drainage, so the bedding stays wet from below. Skip it. If you want to make cleanup easier, use a shallow metal pan or rubber mat under the bedding instead, and remove it when you change the bedding.

How much bedding do I need for a coop with eight chickens?

A standard 4-by-8-foot coop with eight birds needs about one 4-cubic-foot bag of pine shavings per change, changed every one to two weeks. Keep two or three bags on hand so you always have fresh bedding ready. Sand requires more frequent replacement, so budget for four to five 50-pound bags per month.

Can bedding get too deep?

Bedding deeper than 6 inches starts to trap heat and moisture in the lower layers, creating pockets where mold and parasites thrive. Stick to 3 to 4 inches. If you are stirring weekly and changing on schedule, that depth is enough.