I use the pelletized equine bedding from Tractor Supply. Its cheap and I mix it with the pine shavings to make them more dense. It keeps the shavings dry for longer as it wicks up all of the moisture. The chickens weren't crazy about them at first, but are used to them now. Make sure you cover the pellets with shavings the first time, because they don't like the feel of the pellets under their feet. I have a 4X4 coop and use 1 bag to start and cover with about 2" of shavings. I keep rotating the bedding and it all breaks down...I never have damp bedding this way. Hope it helps