Benny and Charlie are 12 week old boy littermates. Having brothers seemed like such a good idea. From the very beginning they played really rough, sometimes more rough than what seems appropriate. We let them work it out but sometimes it turns into a fight. So, we started separating them onto different floors of the house and they both became different dogs. One is chill and the other is rambunctious. Both seem content by themselves. They are amazing when separated, but seem stressed out together. They don't wag their tails when they are together or show each other any "affection". Is this a sign of two temperaments that don't mix well together? Three legitimate dog experts told me that it littermates are a bad idea. They fight and neither reaches their full potential. What do you think? Or is it that having 2 puppies at the same time is a bad idea? Or, is it that they are un-neutered males? We have an amazing home for one of them if we need to permanently separate them. I'm not giving up. I just want to do what's best for THEM.