Our cat has been a mouse destroyer for the 11 years we've had him. Unfortunately some of the wildlife in the area have been victims too. No birds that I can remember but chipmunks, moles, voles, a rat once (outside thank god). He has also almost been done in himself a couple of times. Once he had what looked like talon holes on either side of his spine. I think a hawk or something tried grab him. He's pretty tough.