Again, I ask for any new schools of thought on this. Yup , STILL trying! Both males, both neutered, 10 and 12 months old. If I have them together for a session, Murphy ignores Lionel unless Lionel makes his way over - and usually tries to get a nip in before it turns into a tornado. There is no charging however. Rarely they have come come face to face for a very quick sniff and turn around without an issue....but on the next approach, something breaks out. Murphy seems like he could care less that Lionel is there until that point. I guess I am going to separate their cages....since Murphy is fine - can I just move Lionel into another room and totally keep separate? I have tried EVERY other thing - even a bit of stress bonding - though that didn't seem to work & I am not comfortable with that approach as well as it appears to be a temporary fix any ways. Its really a shame there is no organization or shelter around me that will do "dates". I had to get a "random" second bun without a prior date - and it appears it was NOT a match !!