I have a rat problem with rats in my coop at night and they are living under a storage building that is behind my house but outside the chicken yard. I am only feeding what the chickens eat in a day. I have a rat zapper and it worked for a few nights but now I think that they are way to smart. I only catch the young ones not the parents. I am looking for something natural to control them. This afternoon I will be wrapping the coop with hardware cloth. I will be locking the chickens up at night and hopfully the rats will leave!!!!