Hi, I will be a first time chicken owner this spring. My husband and I are building our own coop. We're using all upcycled materials. Our main foundation of the coop being wooden pallets (not broken down). I was thinking of insulating the inside of the pallets with paper egg trays. Anyone have suggestions on what materials I could use to cover up the egg trays that the chickens would not tear apart? Thank you. Also any suggestions to other good materials to use in our upcycled coop would be much appreciated.