Cute, Fluffy Murderers
I had a GF in HS that had a cat who would try to to kill something every day. He would bring it to the back stoop of their house and would lug it off as soon as she had seen his kill. I have no idea if he was eating his kill, but he did a number on mice, voles, and ground-nesting birds. He was a friendly cat (to humans), but he was a killer. I would have hated to be an animal smaller than him.
An older friend (about 25 years ago) had a big black tom-cat who was very effective, too. He had lost an eye, probably in a fight with a 'coon, but he would wait in the weeds and tall grass and would bring home his kill day after day. Luckily they had a big barn full of hay, so there were plenty of rodents for winter-hunting. He would present the booty to my friend's wife, so Blackie (original name, huh?) could get some praise.