My friend got my started using pelleted horse bedding for my cat box a few months ago. When I decided I wanted chickens she said to use the same stuff. I must say I've been pleased. The girls like to kick it up all over and peck at it. It smells nice too. When I pick up the fuzzy butts I smell them (I know weird) and they smell like the wood pellets instead of poop. It's been easy to clean the poop out of too. They do eat some of it when it's gotten wet from the water dish and falls apart. Oh well right? They have been growing well and eating their starter feed so a little bit of wood won't hurt. They ate the wood shavings more when they were in that.