There shouldn't be any _outdoor cats_, full stop. I don't think people realize the extent of the bird/squirrel/lizard/frog carnage inflicted by the fluffy apex predator they occasionally get to pet. While I've seen many a cat catch & eat small creatures, I once had a neighbor's cat use my bird feeder as the lure for an all-you-can-eat bird buffet.

Yes they eat/kill lots of wildlife but so did the Bobcat, Lynx Ocelot and Foxes that we drove out of much of their North American habitat.