I have been extremely successful with keeping ALL predators away from my chicken shed and am very proud of my record because in 23 years have only had to kill 1 raccoon, RARELY have mice(set snap traps in small boxes 24/7) and everything else I have live trapped and scared the bee-jeebers out of and they do NOT come back. went out to chick shed this a.m. making lots of noise, as I always do, and opened main door and saw what looked like a furry baseball run through one of the unused small openings in shed. I ASSUME its a rat because it was LIGHTENING quick. I have noticed small holes around shed that initially I was packing my dogs poop in and the holes seemed to stop. well-I moved my babies recently and found the hole in their old area going under shed so....anyhow. I am against glue traps,drowning, poisons so this will be my first with having to snap trap something larger than a mouse. have only seen 2 dead mice in last 7 months. none live. so now its a rat(S).