I am new to raising chickens so please forgive my ignorance. I have 4 pullets that are about 5-6 months old. I have them in a 4' x 8' pen with a coop for them to go into when they want to. I have the entire thing wired including the bottom because we have a few fox around our area. I keep hay in the bottom so they are not walking on the wire and hurting there feet. I am currently fencing a much bigger area for them to roam around in but I really don't have a simple way to wire the bottom. Any suggestions on how to keep predators from digging under the fence? Thanks in advance for any suggestions, I really appreciate any advice.