My next door neighbor has 2 cats. They're always outside, and they're really honery. They keep coming over in my yard and causing fights with the ferals and strays I take care of. I've had to pay several vet bills for abcesses caused by her cats, and I'm getting tired of them coming over and fighting! I tried to talk to her and explain the problem, and she just got defensive and rude, and told me that it was none of my business what she lets her cats do. I don't want to take her cats to the shelter, but I'm also sick and tired of having to pay vet bills because her cats are chewing up mine, and the fights are almost always happening in my yard, often times in my shed where my ferals go for protection. What can I do?