I have a semi reformed aggressive 11 year old indoor/outdoor cat (Davinci) living with another cat (for 9 years), two dogs (one for 6 years and one for 2 years) and a house bunny (for 8 years). He has a history of excessive itchy skin and has had to have much of his neck skin removed twice because he will scratch his neck skin so badly...I have him on a careful diet and the extreme itchiness has not been too bad for the last 4 years (no surgery, no meds). It flares mildly in the spring and so does his aggressive behavior. Sometimes I put him on behavior medication if it gets too bad. The dogs watch out for him and avoid confrontations and getting too close to him. Occasionally, he does things like waiting at the dog door for the smaller dog (Kenya) to go through the door and attack her. That being said, a couple weeks ago, my 94 lb Chesapeake Bay Retriever mix (Kola) that Davinci has been living with for 6 years got clawed and was nailed right in the tender fold just beneath the nose - I thought he was going to kill Davinci...he has always been tolerant of getting clawed once in a while, but always just lets it go with a yelp. However, this time he red lined and growled and snarled and bit at him until I got in the room, but did not hurt him at all. I removed the claw with Kola crying and whimpering because it was like removing a fishhook. I didn't see how or why it happened but it is usually due to the dogs not realizing he is on the couch or the under the coffee table. There has been tension with Kola since the event, but I thought it would just blow over. Davinci hissed and swatted at him for no reason today and Kola lost it and went after him again this time - he got clawed on one of his pads...I'm concerned. Kola's super well trained and I got after him for going after him, which will definitely help. I can't permanently put him on meds. My neighbors love Davinci and he goes to them while I am at work and gets lots of attention at home and he is quite happy and content most of the time - the attacks are pretty rare, but I need him to stop completely. I trust Kola unequivocally with my house bunny and other cat and used to trust him with Davinci. Any ideas for building back some trust between the two or getting Davinci to stop with the attacks?