We've had our cat Willie for almost three years. He's a very large (19lb) brown striped housecat. Know little about his history, he's FIV+ and indoors only. Since we first got him we've been working on shutting down little kinds of aggression, a nip here and there, rough play, and sometimes just completely unprovoked(like you're laying there sleeping) bites and hitting(yes hitting like a bat to the head). He's healthy and relatively active inside. We wanted to add a dog to the family but he's so aggressive we could not, he's attacked any dog we've ever tried to have inside(badly attacked-one instance he ripped out all his own claws on a dog's backside, another time he sliced up the inside of my mother's dogs mouth). We accepted because Willie was here first we wouldn't be able to add a dog to the family until he was gone- and when people with dogs or kids come over we just dont have them inside or we put Willie in the spare room with all his stuff(when we do this it's not a great option, he pees and poops out of his litterbox even though it's in there with him, shreds blankets or other stuff in the room, and HOWLS for hours on end. . Now however it's escelating- a friend of ours had her puppy over yesterday and they were spending time outside, Willie was apparently watching through our sliding glass door and when my friend tried to open it Willie tried to bolt out to attack her dog and ended up slicing her leg to ribbons in the process. So, help?! I'm all for making accomodations and sacrifices for our pets it's why we do it, but my life is really starting to be dictated by my not so nice feline friend.