I have a 2.5 year old male cat (neutered). I just adopted another 1 year old male cat, recently neutered. I followed the guidelines in Hissy's article about introducing new cats to resident cats, and am not having much success. I have had the new cat for 3 weeks, and every meeting with the old cat is a slug fest. The new cat chases the old cat, and the old cat runs - so the new cat chases more, and eventually they fight. So far we have gotten away with just a scratch on the nose, but I'm afraid it will get worse. Is there something I'm not doing? I'm in need of advice. I desperately don't want to return the new cat to the shelter, but I don't want my old cat to have to constantly defend himself. Is it hopeless or should I keep trying?