We had Two huge male cats. One of which was an "Outdoor Cat" when we got him but would only let him out on the porch on a harness. This cat was never really happy and I allways looked at him as a tough cat. One day a female cat showed up at our door the looked like it had been nursing. I figured someone gave her and the kittens the "Heave Ho" and I was wondering what to do. I opened the door so she could look in and she saw my two males. Before I could react she shot into the house and absoloutly brutalized both my cats. I finally caught and ejected her and my cats stayed hidden under the bed for over an hour. I later found how the female came to the neighborhood and sent her back.