Thank you for the responses. I don't know what I'm going to do. I agree that this guy needs to move, but boy does he have a cute little feather nest. One mouse is darn cute--30 is a problem, and I know that if I leave this guy alone he'll get married and start a family. It seems sad no matter what I do--even if I leave him alone and the chickens eat him--that's probably the worst solution.

I would move him but it's so cold outside--snow everywhere outside of the coop. I don't even need a trap to get him as I probably can just push him and his nest into a box and move him out, but I'm pretty sure another relative will move back in.