I use straw in the covered run & in the house. Inside the hosue I put down pine pellet bedding first though, it's very absorbent, keeps the smell down A LOT, and is easy to turn over. plus the chickens like going in these and turning it for me so they can dust bath in the broken down pellets
GEM white shavings in their house. I find it really absorbent and easy to fluff up. We tried straw with shavings and I will still put straw in if it gets super cold, but it gets slimy otherwise. My ducks are always in their pool or in the snow the last few days....ugh and get the straw really wet. And yes! The chickens get in there in scratch it all up and keep it turned over!