Are you feeding some neighborhood kitties?
If you are feeding stray kitties, or even if kitties are coming to your house to eat your kitties' food, then it is your responsibility to see to it that they are spayed or neutered, because even though they "aren't your cats" - they are relying on you to survive.
FERALS VS. STRAYS
Often people confuse a truly feral cat with a stray cat. A feral cat is a wild animal that has never had any human contact - and doesn't want any human contact. A stray cat was once someone's pet who through some awful circumstances has ended up roaming the streets in search of a place to call home. Both feral cats and stray cats need help to survive.... food, shelter, vet care.
PAWPRINTS ON YOUR WINDSHIELD?
Cat poop in your garden? Cat spray on your front door? Cats fighting and howling all night? All of these things happen when you have unaltered cats in your neighborhood. While it may not stop them from walking across your Car at night, spaying and neutering the neighborhood cats will stop the fighting, the howling and the spraying. It will also do the most important thing of all - stop them from reproducing. This year you may see four or five cats - but by the end of the summer you'll be seeing 15 or 20.... and it will only get worse until you decide to take action.
While you may insist that these outside cats are "not my cats" you cannot simply ignore them and make them go away... nor can you call Animal Control to "come and get them" because Animal Control does NOT TRAP CATS. If you want to alleviate the cat overpopulation problem in your neighborhood, take action and start a Trap/Neuter/Release program.
Trap/Neuter/Release is the ONLY way to effectively control overpopulation. Remember this: the cats are there for a reason. Someone abandoned them at some point. Simply removing cats from this environment will not solve the problem as other cats will come in to take the place of the cats removed. A Trap/Neuter/Release program will sterilize all the cats so that those cats will not reproduce - and those existing cats will protect their territory from new, unaltered cats.
Trap/Neuter/Release is EASY... and it saves lives. For every unaltered female cat (and her offspring) on your street you can count on up to 50 more kittens in the next year... and that is a LOT of cats!