I had the same trouble with Smoke who was used to living in a Garage , and was on the dirty side. She couldnt chase the other cats as she was obese , but swattred them when they came too close. I was looking for another home for her when she had a bad stroke and had to be put down, I think that if she was cleaner and not so mean , I would have fought more foe her , but it was better foe the other cats , and for me not finding feces and pools of urine everwhere!