Recently we've been having a rat problem in our chicken coop. I'd say it started maybe 1-2 months ago? We've been trying to deal with them, and have killed a few here and there, but they just won't take the hint. Just the other week we patched up all the new rat holes they chewed in the coop, and got rid of a few rats too. They had made a nest up in the roof. The coop used to be a large rabbit cage, that only was covered halfway by a roof (so the rabbit had an area to bask in the sun). So after the rabbit passed away, some years later we decided to convert this big rabbit coop into a chicken coop, we put a large roof over the original roof. This left a little bit of room in between the 2 roofs, and the rats apparently found that and made a happy little home in there. We took the roof off and got rid of the nest along with a few rats, and patched up all the holes that we could see. After doing that, there was no noticeable rat activity for a while. So I was thinking 'great, maybe they're gone now'. But no, sadly today when I opened up the coop to let the girls out, there were a bunch of wood pieces on the floor. I looked up, and sure enough a rat had tried chewing a new hole on the inside of the cage...meaning they somehow got back in again. We had patched the holes with sheet metal, so they didn't get back in through those. Probably made a new hole someplace. I'll have to patch those up again I suppose. This coop is also about 3 feet off the ground too, if that matters. But anyways, what are some good ways to get rid of/deter rats that will not harm my chickens??