Its why I keep my dogs in the yard.
I've live in a rural area so I have one of those electric fences to keep my dog close to home. The two cats have long since learned that air conditioning and central heating are far more comfortable than summer or winter weather. But growing up I remember neighborhood cats who were let outdoors to roam the neighborhood. And I especially remember my dad's comments when he had to clean up my sandbox. Regardless, this was not a feral cat, it was a neighborhood cat who had gotten outdoors. She shot the cat because she thought it would be neat. She's learning that few people are as cruel as she is.