Enforce whats there now. That does not seem to be happening. Quit feeding the ferals peopl; if you want to help, catch and S/N them. Feeding them is only fueling the problem. All animals are cute when they are little but they all will grow to breed. When you acquire an animal, it should be S/N unless specific breeding plans are intended; If no breeding is planned and the pet is not S/N, then you should not have a pet.