I was able to drown a few young rats in a bucket trap with water. It wasn't actually my plan, but the juveniles got in a horse water bucket. Lots of rats by the time you see any! I never caught one in a live trap, and finally locked all my critters up and set out poison. After about a week, no more bait was eaten, so I picked it up, waited a few more days, and let everyone out. I never actually found a dead rat, either, but all signs were gone. My coop is pretty rat proof, and the birds only have food available there. I stopped feeding the wild birds this summer too. No food of any sort is left outside! Mary