After losing way too many birds due to raccoon and rat attacks, I decided enough was enough and made the bottom of their pen 1/4 inch hardware cloth. I was feeling all guilty because they won't get to be on the ground anymore, but safety first for my birds. But oddly enough, my birds PREFER the wire floor. Lol. Probably because they were raised on wire. I also elevated the pen off the ground. My birds used to be terrified of me and run around like crazy when I'd feed them. Now they come right up to me as I'm feeding them. Go figure. All this time I've been telling everyone how dumb my quail are, but it turns out I'm the dummy!