Quick answer: the deep litter method means you leave the coop bedding in place and keep adding fresh carbon material, such as pine shavings, on top instead of cleaning it all out. Start with 4 to 6 inches, stir it and top it up as it gets soiled, let it build to 8 to 12 inches, and the bottom slowly turns into compost that keeps the floor drier and a little warmer in winter.
It is the lazy-sounding method that actually takes some care. Done well, a deep litter coop smells like a forest floor and you clean it out once or twice a year. Done badly, it is a wet, ammonia-heavy mess. The difference comes down to a few simple habits, and this guide covers all of them.
What Is the Deep Litter Method?
The deep litter method is a way of managing chicken coop bedding where you build up a thick layer of carbon-rich material and let it compost in place. Instead of scooping out soiled bedding every week, you add a fresh layer over the top, the hens scratch the manure down into it, and microbes slowly break the whole thing down.
It is not just “bedding you forgot to change.” There are really two versions people mix up:
- True deep litter is a living, slightly moist, composting system. It works best on a dirt floor, where soil microbes and worms can move up into it.
- Deep bedding is a drier version used on raised wooden floors. It builds up the same way but stays too dry to really compost, so you clean it out more often, roughly every two to three months.
Both save a lot of work over weekly cleanouts. Which one you end up with depends mostly on your floor.
How Does Deep Litter Work?
Chicken manure is rich in nitrogen and, according to University of Minnesota Extension, about 70% water. Pine shavings, straw and dry leaves are rich in carbon. When you keep adding carbon on top of the manure, you get the same mix a gardener builds in a compost pile, and bacteria and fungi start breaking it down.
That composting does three useful things:
- It ties up nitrogen. Plenty of carbon holds onto the nitrogen in manure instead of letting it escape as ammonia gas.
- It gives off gentle heat. Composting warms the lower layers a little and the deep bed insulates birds from frozen ground. It will not heat the coop air, but it helps.
- It keeps hens busy. Chickens love to scratch through deep litter for bugs and seeds, which turns the bedding for you.
You will read online that the microbes in old litter make vitamins like B12 and K that the hens pick up while foraging. Older poultry research and authors such as Harvey Ussery have written about this, but treat it as a bonus, not a substitute for good layer feed.
How to Start the Deep Litter Method, Step by Step
Fall is the ideal time to start, because the litter has time to build and get going before the coldest weather. Here is the setup I recommend:
- Start clean and dry. Clean out the old bedding, let the floor dry, and fix any leaks or spots where rain gets in. A wet start is the most common reason deep litter fails.
- Protect a wooden floor. If your coop has a wood floor, cover it with sheet vinyl, linoleum or a rubber mat first (more on floors below).
- Add 4 to 6 inches of bedding. Coarse pine shavings are the easiest base. If you have a dirt floor, a few handfuls of old litter or garden soil can help “seed” it with microbes.
- Stir it every week or so. Turn it with a pitchfork or rake, or just toss a handful of scratch grains and let the hens dig.
- Top up when it looks soiled. Add an inch or two of fresh material whenever you can see a lot of manure on top. Small and often beats a big pile once a month.
- Let it build to 8 to 12 inches. Deeper litter composts better and holds more moisture without getting wet on top.
- Do the smell test. Bend down at chicken height. Earthy is good. Ammonia means add carbon and stir (see below).
Add a kickboard across the bottom of the coop door, 8 to 12 inches high, so the litter stays inside. UMN Extension suggests a 6 to 8 inch kickboard for deep bedding, so go higher as your litter builds. Also check that your roosts and nest boxes still sit well above the litter once it is deep.
Best Bedding for the Deep Litter Method
Almost any dry, non-toxic, carbon-rich material works, and a mix of two or three works better than one because it packs down less. This is how the common choices compare:
| Material | Pros | Cons | Best for |
|---|---|---|---|
| Pine shavings (large flake) | Absorbent, easy to find, dries fast, smells good | Costs more for big coops; fine shavings get dusty | The best all-round base layer |
| Straw | Cheap, insulating, hollow stems hold warm air | Mats down, holds moisture, can grow mold on dirt floors | Top-ups on wood floors, mixed with shavings |
| Hemp bedding | Very absorbent, low dust, composts well | Expensive and harder to find | Small coops, people with dusty-air worries |
| Dry fall leaves | Free, great carbon, hens love digging in them | Mat when wet; must be fully dry; can blow in mold if stored damp | Mixing in with shavings on dirt floors |
| Aged wood chips | Free from tree crews, last a long time, great in runs | Fresh green chips can mold; bulky in small coops | Runs and large dirt-floor coops |
| Shredded cardboard or paper | Free, absorbent | Mats quickly; avoid glossy inks | Stretching other materials |
| Cedar shavings | Smells nice | Aromatic oils can irritate chicken airways | Avoid |
| Hay | Soft | High in nitrogen and moisture; molds and makes ammonia | Avoid |
Pine Shavings for the Deep Litter Method
Pine shavings are my first pick because they are easy to buy, they absorb a lot, and they dry out again quickly. Buy kiln-dried, large-flake shavings meant for animal bedding, not fine sawdust. Pine is fine for chickens. It is cedar, along with other strongly aromatic woods and black walnut, that you should avoid.
What Is the Best Bedding for Chickens in Winter?
For winter deep litter, I like a base of pine shavings with straw or dry leaves mixed in. Shavings handle moisture and straw adds a bit of insulating loft. Just do not let straw take over, because it mats and holds damp, which is exactly what you do not want in a cold coop. There is a longer comparison of every option in my guide to the best bedding for chickens.
How Often Should You Turn and Add to Deep Litter?
There is no exact schedule, because it depends on how many birds you have, your climate and your coop. These are good starting points:
| Task | How often | Why |
|---|---|---|
| Toss scratch so hens turn it | Daily or every few days | Mixes manure into the bedding |
| Turn with a fork, especially under roosts | Weekly | Breaks up the crusty manure cap |
| Add 1-2 in of fresh carbon | Every 1-2 weeks, or when manure shows | Keeps the top dry and the smell earthy |
| Spot-remove wet patches (around waterers) | As soon as you see them | Wet litter goes sour and grows mold |
| Full or partial cleanout | 1-2 times a year | Harvest compost and reset depth |
The spot under the roost gets most of the manure and often forms a hard “cap.” Breaking that up once a week, or using a droppings board, keeps it from getting wet and smelly. Crowding makes capping much worse, so check that you are giving your flock enough room using my guide to how much space chickens need or the chicken coop size calculator.
Does the Deep Litter Method Smell? The Ammonia Test
A healthy deep litter coop should not smell like ammonia. It should smell earthy or like wood. If it stings your nose, something is off, and it is worse than you think. Penn State Extension notes that people usually cannot smell ammonia until it reaches about 20 to 30 parts per million, while guidelines suggest keeping it below 25 ppm for birds (Penn State Extension). By the time you smell it, your hens have already been breathing it.
The fix depends on the cause:
| What you notice | Likely cause | Fix |
|---|---|---|
| Ammonia smell | Too much manure, not enough carbon | Add 2-3 in of shavings or dry leaves and stir |
| Wet, clumpy patches | Leaky waterer, roof leak or condensation | Remove wet litter, raise or move the waterer, fix the leak |
| Hard crust under roosts | Too many birds or no turning | Break it up weekly; add a droppings board |
| Frost on walls, damp air | Not enough ventilation | Open high vents; never seal the coop tight |
| Dusty, powder-dry litter | Too dry to compost (common on wood floors) | Normal for deep bedding; a light sprinkle of water helps true deep litter |
| Moldy or musty smell | Wet straw, hay or green wood chips | Remove that patch and switch materials |
Ventilation matters as much as bedding. Moisture and ammonia rise and need vents up high to escape. The Merck Veterinary Manual notes that adequate ventilation is what removes moisture from bedding, and suggests a litter moisture of around 20 to 25% (Merck Veterinary Manual). In practice, that means it should feel barely damp, like a wrung-out sponge that has dried a bit, never wet.
Deep Litter on Wood, Dirt or Concrete Floors
Your floor makes a bigger difference than any other choice.
| Floor | How deep litter behaves | What to do |
|---|---|---|
| Dirt or earth | Best for true composting; soil microbes and worms join in | Make sure the site drains well and water runs away from the coop |
| Wood | Stays drier; acts more like deep bedding; can rot the floor if damp | Cover with vinyl, linoleum or a rubber mat; clean out every few months |
| Concrete | Works, but stays cooler and composts slowly | Add a shovel of soil or old litter to seed it; start deeper |
Protect a wood floor. Composting litter holds moisture against the boards, and it will rot plywood over time. A sheet of vinyl flooring or linoleum cut a few inches up the walls is the easiest fix. Keep an eye on the bottom of the walls, too.
Can You Use Deep Litter in a Small Coop?
Yes, but small prefab coops make true deep litter harder. Many have a raised wooden floor and only a couple of inches of space before bedding falls out the door. In those coops, I think of it as deep bedding rather than true deep litter:
- Add a board across the bottom of the door so you can get at least 6 inches of bedding.
- Use large-flake pine shavings, which stay fluffy longer than straw.
- Expect to clean out every 6 to 12 weeks rather than once or twice a year.
- Do not overcrowd. Small coops are the first to smell when there are too many birds.
Deep Litter in the Chicken Run
Deep litter works brilliantly in a covered run, and it turns a muddy patch into a foraging area. In the run you can be less fussy: aged wood chips, leaves, garden trimmings, spent plants and thin layers of grass clippings all work. Keep any one layer of grass clippings thin, about an inch, or it will mat and go slimy.
An uncovered run gets soaked by rain and snow, so the litter may stay wet and need refreshing more often. Wood chips handle that best.
Is Deep Litter Good for Chickens in Winter?
Winter is where deep litter really earns its place. A thick, dry bed insulates the hens from frozen ground, the slow composting adds a little warmth at floor level, and you do not have to haul wet bedding out in the snow. It is one of the main reasons I can skip the heat lamp. You can read the full cold-weather setup in my guide to keeping chickens warm in winter.
Two cautions. First, the extra moisture from a flock that spends more time inside means you have to watch the litter closely and keep vents open; damp air is what leads to frostbite in chickens. Second, deep litter will not warm the air around the roost, so it does not replace a draft-free coop and good roosts. If you are wondering how much cold your birds can really handle, see how cold chickens can tolerate.
When to Clean Out Deep Litter and Use It as Compost
Most people do a big cleanout once or twice a year, often in spring and fall. UMN Extension also recommends planning a deep clean in spring after winter deep bedding. Signs it is time:
- The litter is so deep it reaches the nest boxes or the door
- It stays wet or smelly even after you add carbon
- You have had a disease problem, or a heavy mite infestation (see chicken mite treatment)
When you clean out, many keepers leave a few inches of the old bottom layer behind to seed the new bed with microbes. If you had a disease outbreak, though, take everything out, clean the coop and start fresh.
Finished litter from a dirt floor is often dark, crumbly and smells like soil, and it makes a great garden amendment. Litter from a wooden floor is usually still raw, so pile it and let it finish composting first. To be safe with fresh manure, compost it fully before it goes on vegetable beds, and avoid spreading raw litter close to harvest.
Pros and Cons of Deep Litter vs Regular Cleanouts
| Deep litter | Weekly cleanout | |
|---|---|---|
| Labor | Low; top up and stir | High; scoop and replace often |
| Bedding cost | Lower over a year | Higher |
| Winter warmth | Insulates and adds a little heat | None |
| Smell | Earthy if managed; ammonia if not | Low, but builds between cleans |
| Moisture risk | Higher; needs good ventilation | Lower |
| Garden compost | Yes, plenty | Some, needs composting |
| Best for | Dirt floors, cold climates, gardeners | Small raised coops, wet climates |
Common Deep Litter Mistakes
- Starting too shallow. Two inches is not deep litter. Start at 4 to 6 and build.
- Letting it get wet. Leaky waterers and roofs are the biggest problem. Move water outside or raise it on a stand.
- Sealing the coop. Without high vents, moisture and ammonia have nowhere to go.
- Using hay or cedar. Hay molds and cedar irritates lungs.
- Too many birds. Overcrowding makes manure pile up faster than carbon can handle it.
- Never stirring. Unturned litter packs down and caps under the roost.
- Skipping the wood floor liner. Composting litter will rot an unprotected floor.
The Bottom Line
The deep litter method is less work, less waste and a warmer floor in winter, as long as you keep adding carbon, stir it and keep it from getting wet. If the coop smells earthy, you are doing it right. If it smells of ammonia, add more shavings and open a vent. For more on cold-weather care, UMN Extension’s cold-weather guide is a good reference.
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Frequently Asked Questions
What is the deep litter method for chickens?
It is a way of managing coop bedding where you keep adding fresh carbon material, such as pine shavings, on top of the old bedding instead of cleaning it all out. The hens mix the manure in, and the bottom layer slowly composts in place.
How deep should deep litter be?
Start with 4 to 6 inches of bedding, then let it build to 8 to 12 inches over the following weeks. Deeper litter composts better and stays drier on top.
What is the best bedding for the deep litter method?
Large-flake pine shavings are the easiest base. Mixing in dry leaves, some straw or hemp helps it stay fluffy. Avoid hay and cedar shavings.
Can you use pine shavings for the deep litter method?
Yes. Kiln-dried, large-flake pine shavings are one of the best materials for deep litter because they absorb moisture and dry out quickly. Avoid cedar, not pine.
How often do you clean out deep litter?
Usually once or twice a year, often in spring and fall. Small coops with raised wood floors may need a cleanout every 6 to 12 weeks.
Does deep litter work on a wood floor?
Yes, but it stays drier and composts less, and damp litter can rot plywood. Cover the floor with vinyl or a rubber mat and plan to clean out more often than on a dirt floor.
Why does my deep litter smell like ammonia?
There is too much manure or moisture for the amount of carbon. Add 2 to 3 inches of fresh shavings or dry leaves, stir it in, remove any wet patches and make sure the coop has vents up high.
Does deep litter keep chickens warm in winter?
It helps. Composting adds a little warmth at floor level and the thick bed insulates birds from frozen ground, but it will not heat the coop air. A dry, draft-free coop with good roosts still matters most.
