Cats are cute, but never forget that these little animals are vicious predators at heart.
Many years ago we had a cat that was rather large as domestic cats go. We called him Big Butt. The kids named him that and, although we told the kids the name was not appropriate, the name stuck.
Big Butt had access to the house via a swinging pet door and could come and go as he pleased. He would occasionally bring home dead mice and small rabbits which I would take away from him and flush down the toilet.
Through sheer neglect we ran out of cat food one day. Big Butt did not get fed for a couple of days. A couple of nights later I was alone in the house when I heard Big Butt come in through his swinging door. I turned and looked, and there he stood, standing tall in the middle of the living room with the neighbor's chihuahua clamped in his teeth. The poor dog was dead as a door nail.
I got the dog's corpse away from Big Butt. He was to big to flush so I put him in a trash bag and dumped him in the garbage can. Then I went out and got some cat food. I'm sure Big Butt interpreted the return of tuna to his bowl as a reward for killing the dog.
For months afterward the neighbors posted a reward for the return of their dog. I never said anything.