I do think that the issue in the US about rabies makes a difference. We lived in New Jersey, its 20 years ago now. Dogs had to be vaccinated against Rabies and have a medallion on their collar to prove it, you took your vacc cert from the vet to the local police station as I recall to get the medallion which was year dated. Dog were not allowed off lead ANYWHERE off your own property and it was acceptable, even socially responsible to humanely trap wandering cats and take them to the vet to be humanely PTS. In those circs, the only way to keep a cat is as a house cat perhaps with a secure outdoor run, it would have to be very secure because bats, woodchucks, skunks and raccoons can also carry rabies.