It was larger than a mouse but much smaller than a rat. Had a very long skinny body and a short tail. It was solid brown. It wasn't afraid of me, just walked around a little and then ran under the chicken coop. I wish I had a shovel in my hand! I have the chickens locked up and the gates are open to their yard so the cats can get in there. Would this have been a baby weasel or just a small one or what? I don't think it was a gopher. We do have them around here. I've never seen a weasel before but I've only had chickens for a year or so now.