My cats are all indoor cats and confine their hunting to unfortunate mosquitoes and the occasional bee. For a while, I lived at my father's house with LuLu. Dad had a basement full of mice. Every morning, like clockwork, he would get up at 4:30 for work, step on the latest kill with his bare feet, and shout "That F***in' cat!" Poor LuLu never got a thank you and never brought one to me. I think she enjoyed upsetting him.