I have two neutered males, Chip is a rescue and was around a year old when I got him. Harley is a semi-rescue and I got him around age two. They both have friendly personalities, and are for the most part pretty easy going. I've only had Harley just over a month, and so far no fights just some wrestling, and toy snatching. I think they both really enjoy having each other as siblings, since they are both around the same age, size, personality, and temperment. Currently Harley has been obsessed with my 10 yr. old cat, who doesn't share the mutual feeling