[107barney]

No, I would not leave them together alone.
Whoever told you that the once a day getting into it and sounding scary may never go away was not accurate IMO. That behavior will diminish to occasional scrapping between them once Reesie has learned the appropriate canine manners. My three have an argument maybe once in a while like any family member annoying another would. Your boys need time, and this process can take months. Stop trying to rush the love between them, it is Snick's choice when he will want to butter up to Reesie. I know it is not what you want to hear, but trust me in the end all will be well between them.

Personally, I'd allow them to sleep together, but I'd make sure it was in my room. I'd put them in the same pen to sleep but again I'd make sure it was when I was there. Teddy slept with the others, it was the only time he didnt act like a little annoying piranha with his jaws snapping in Barney's face. It helped them to bond, without stress. Perhaps your boys need more time together. By now, Snick realizes that the little intruder is not going away, and he will soon accept him fully......He already has done so (tug of war, playing, etc).....

Good luck!