I made some brooders last year for chicks. They were solid plywood and also hardware cloth framed in with wood and a few feet off the ground. I had some roosters in there since I don't have any chicks right now. One rooster (the smaller one is totally gone and the other large rooster is missing his head and neck. This critter chewed right through 1/2 inch thick plywood in the middle of the brooder roof. It didn't start chewing at a corner but straight down. I have seen foxes, raccoons, possums, and the occasional bobcat around here. I suspect this is raccoon damage...is that what everyone else thinks too?