Algernon, my heart rat, had been a solo rat for some time because he was always very aggressive with other ratties. I have tried getting him a friend, I really have. Its time to try again. Recently, I got a new male, Asher. Over the past few months, I have been introducing them. Algernon injured Asher and I haven't had them together since. Today, I tried putting them together in a neutral space. Algernon bit Asher hard. Any tips? I really need help.