I use the pine chips with paper underneath, I buy mine at the Farmer's Co-op. I do have a question for everyone. This is my 3rd year with chicks, I have 38 right now that are 21/2 and 1 week olds. I have their water elevated a little so the chicks can reach it and it doesn't sit on the chips, but they scratch and get paper and chips in the water. Then it seems like the chips kind of wick the water into the totes. Any suggestions on how to keep the water clean? It is really smelly when it gets wet!
When they get older I use wood stove pellets.