Wheat straw is the most widely used and generally best all-around bedding for pigs. It’s absorbent, provides good thermal insulation to keep pigs warm, and is readily available in most regions. But “best” depends on your setup, climate, and budget. Straw works well for most situations, while other materials like wood shavings, shredded paper, and miscanthus each have advantages that make them the better choice in specific circumstances.
Straw: The Standard Choice
Cereal straw is the default bedding in straw-based pig systems for good reason. It’s soft, easy to handle, absorbs moisture well, and has enough thermal mass to help regulate pen temperature in cold weather. It also breaks down into a carbon-rich material that composts nicely with pig manure.
Not all straw is equal, though. Wheat straw is the most common on pig units because it strikes the best balance between absorbency, durability, and low palatability. Pigs are less likely to eat it compared to other cereal straws, which matters because you want bedding to stay as bedding. Barley straw is softer and more absorbent than wheat, but pigs find it tastier and will eat more of it. Oat straw absorbs the most moisture of the three, but it’s highly palatable, often more expensive (since it doubles as cattle feed), and its light, airy structure blows away easily in outdoor arcs.
One downside to straw in warmer climates or during summer months: its insulating properties can work against you. Research on fattening pigs found that straw bedding can raise pen temperatures during hotter seasons, potentially worsening heat stress. If you’re in a warm region, you may want a thinner straw layer in summer or a different material altogether.
Wood Shavings: Good Absorbency, Some Risks
Wood shavings are a solid bedding option that provides both comfort and high absorbency. They work well in indoor pens and are especially useful when straw is scarce or expensive in your area. Setting up an account with a local lumber yard can keep costs reasonable if you’re buying regularly.
The critical consideration with wood shavings is the type of wood. Some species are toxic to pigs. Cherry wood, for example, can be harmful. When ordering shavings, always specify that they’re for livestock use and confirm the wood species. Treated or chemically processed wood should never be used. Clean, untreated softwood shavings from pine or spruce are the safest options, though you should avoid shavings with excessive fine dust, which contributes to airborne particles in the pen.
Shredded Paper: Ideal for Farrowing
Shredded paper and cardboard are dust-free, highly absorbent, and light to handle, making them an excellent choice in the farrowing house where piglets need a clean, warm environment. Paper can be sourced inexpensively from nearby recycling centers and often comes packaged in bales for easy transport.
The trade-off is maintenance. Shredded paper bedding heats up faster than straw, which can encourage bacterial and pathogen buildup. You’ll need to change it more frequently than other bedding types. For a farrowing pen where hygiene is paramount, this extra effort is worth it. For grow-out pens with larger groups of pigs, the frequent changing becomes less practical.
Miscanthus: High Absorbency, Limited Supply
Miscanthus, sometimes called elephant grass, can absorb up to three times its own weight in moisture, making it one of the most absorbent bedding options available. It also composts quickly, which simplifies waste management. If you can source it locally, it’s an impressive performer.
The challenge is availability. Miscanthus is a high-yielding energy crop valued as a biofuel, so supply for livestock bedding can be limited and prices may fluctuate depending on demand from the energy sector. It’s worth investigating local growers, but don’t count on it as your sole bedding source unless you have a reliable supplier.
Sand: Comfortable but Impractical
Sand gets high marks for comfort. It conforms to a pig’s body shape, creating an excellent resting surface. But it fails at almost everything else. Sand doesn’t absorb moisture, so manure and urine build up on the surface rather than being wicked away. Cleaning soiled sand is labor-intensive, and disposal is a significant challenge since it doesn’t compost like organic bedding materials. For most pig operations, sand creates more problems than it solves.
Dust and Respiratory Health
Whatever bedding you choose, dust levels matter. Airborne dust concentrations above 3.7 mg/m³ can negatively affect pig respiratory health, and the threshold drops to just 0.23 mg/m³ for the finest respirable particles. Bedding is a major source of dust in enclosed pig buildings. When dust combines with ammonia from urine and manure, the damage compounds: research on pigs exposed to dust mixed with ammonia and other gases found destruction of the protective lining in their airways, while dust exposure alone at normal levels caused no observable respiratory problems.
This is why ventilation matters as much as bedding choice. Straw and wood shavings both generate some dust, particularly when being spread or when pigs root through them. Shredded paper has a clear advantage here, producing virtually no dust. If you’re housing pigs in a tightly enclosed building with limited airflow, factoring dust into your bedding decision becomes more important.
Rubber Mats as a Supplement
Rubber mats placed in resting areas aren’t bedding in the traditional sense, but they’re sometimes used alongside or instead of loose bedding on concrete floors. Research on gestating sows housed in groups found that rubber mats significantly reduced bursitis, the painful joint swelling caused by repeated pressure on hard floors. However, the mats did not reduce overall lameness, leg injuries, or hoof problems compared to bare concrete. They’re a useful addition for cushioning resting areas but don’t replace the absorbency and warmth that loose bedding provides.
Composting Your Used Bedding
Used pig bedding mixed with manure makes good compost, but the bedding material you choose affects how quickly it breaks down. Effective composting requires a carbon-to-nitrogen ratio around 30:1, while pig waste alone sits at roughly 14:1, meaning it’s too nitrogen-heavy on its own. Carbon-rich bedding like straw or wood shavings balances this ratio naturally.
With proper moisture, a good carbon-to-nitrogen balance, and regular turning for aeration, a compost pile can be ready in two to four months. Dry material, high carbon content (as with excessive wood shavings), and cold weather all slow the process. Straw-based bedding tends to decompose faster than wood products. Miscanthus also breaks down quickly. If you plan to spread composted bedding on cropland, the composting period can be shorter since further breakdown happens in the soil.
Choosing Based on Your Setup
For most pig keepers, wheat straw is the best starting point. It’s proven, affordable, and works across nearly every housing type. If straw is hard to source in your area, wood shavings from a known, safe wood species are the next best option. For farrowing houses, shredded paper’s dust-free, highly absorbent qualities make it worth the extra bedding changes. In warm climates, reduce straw depth during summer or switch to a less insulating material.
Regardless of material, all bedding should be dry and free from visible mold when you put it down. Damp or moldy bedding defeats the purpose entirely, creating exactly the kind of bacterial environment you’re trying to prevent. Buy or store bedding under cover, check it before spreading, and change it before it becomes saturated.