Recently a stray black long haired cat has adopted us as his new owners. He is not neutered and he is beating the living daylights out of our other cats. Do you think he'll stop beating up my cats when he's neutered? Also we have named him Darth Vader because he has heavy breathing and he sneezes. He has been sick for probably a good month and a half. I just have to get some extra money to take him to the vet, and we're going to soon but i didn't know that cats could hold an illness this long. He has also given it to the cat he beat up most often. His name is Aaron and he is currently living in our attic so he can recover. ANy ideas on this sickness???