The cats causing the problems may be feral cats. My sister has two cats that were trapped as feral cats. She and several friends trapped and rehomed quite a number of feral Siamese kittens living near her boyfriend's workplace. They were hoping to trap the mama, a lovely bluepoint Siamese, get her spayed, and release her, but so far, no luck. She and a coworker recently trapped some kittens near a place where she was consulting and she now has new ginger kitten named Damon. I don't understand how feral cats can survive the winters here, but somehow they manage.
Oscar OA AXJ CA CL3, 4/23/05
& Mali CA CGC 5/2/06, both rescued, docked & floppy
Pups, Kippy, Betsy, Labs; Samantha, Susie, Coco & Tom, Siamese kitties; all at the Bridge