Yeah that's another consideration. The live capture method might not immediately solve my problem like putting out poison might have, but it works eventually (I think I still have mice at this point but the situation is much better now) without other negative consequences.

Cato is wicked smart though. I had tried to feed him one of the mice I captured, by releasing it right in front of him, but having been in the little mouse trap overnight the mouse wasn't looking very well at all, kind of slowly hobblign out and around, and Cato looked at it like "heck no I'm not eating that" — at the time I thought he was just being too picky, it hadn't even occurred to me that he might be instinctively thinking that such an unwell looking mouse might be hazardous to eat.