Any type of trap set in front of bait will take weasel BUT if i were you i would let the little fellar go and keep feeding him so he will stay around AS i like them as they keep mice and rats out of fur shed . I had a weasel sit and watch me skin mink and rats. I would toss him a small chunk of rat every once in awhile and he would grab it and run behind some bvr boards lol. As long as he was in fur shed i let him stay... They dont eat much :-D