I was looking at a site for survivalists. I wound up there because I was looking for information about the history of cats hunting in the service of people. One of the survivalists was interested in acquiring a cat to kill rodents on his land. He wanted to know if some breeds were better than others for the job. Most of the responders said mixed breed cats are the best. They also said well-fed cats can be good killers, and that depriving the cats of food to get them to hunt is silly.
We wouldn’t have cats in our lives at all if they didn’t enjoy killing. That’s what made them useful in the first place. Then we turned them into cuddle-bugs and status symbols and companions, but before all that, they were assassins for hire!