Turkish Angora kittens & cats in Kennewick, Washington

Miller came to me while I was in a relationship a couple of years ago, and my ex unfortunately was unable to come back for him. I agreed to keep Miller as long as there were no ongoing issues with my resident cats, which has become a new problem lately. Miller is very sweet and snuggly, and he has no issues with one of my 3 resident cats and enjoyed all of the foster kittens I had. However, he has started marking significantly and being more combative since I returned from a 3 week vacation with my oldest cat (my 12 year old Tuxedo came with me). He seems more disturbed by his presence now than he used to, and has taken to marking my bed and other areas of the house. It was never my intention to keep him but he’s such a sweet boy and I desperately wanted to make it work! However, his new anxiety is causing stress on my resident cat who has health issues (which is the cat he actually likes).