Raven which is Nicky's actual real brother (they came from the same litter) just do not seem to get along at all. When I rescued both of them many years ago, I was planning on trying to find Raven a good home but since I couldn't, we decided to keep him. Well, Nicky was in the house & since I had one cat that lived in our building out back & needed a companion as her companion Sunny Bunny passed away, I decided to let Raven live out there with her which worked out great; however, unfortunately, our Little Bit passed away & that left poor Raven out there alone so I decided to bring him into the household with the other cats. He has adjusted quite well & even though he's not bosom buddies yet with the other cats they seem to tolerate him except for his real brother Nicky. Nicky does not like him at all & always instigate a fight with him. Raven's been in the house for about 6 months now & he's not exactly the friendliest cat himself. He doesn't like to be held & to hold him, you have to catch him off guard as if he sees you coming at him, he will run & hide. They are both about 8 yrs old now & I'm hoping in time that they will warm up to one another & be friends or at least tolerate one another. Maybe 6 months is maybe too soon to expect this? Raven does enjoy being in our house & he's definitely a chow hound as he loves to eat & the only one he has actually warmed up to is Mr. Topaz which looks identical to him except Mr. Topaz is a little larger than he is.