We walked around some more when 2 dogs off leash came over and started cheking out Bubba. All was ok until this small Collie came over. Because of the long hair I didn't know that it was an intact male. I don't know who started it but all of a sudden they went at it! I was worried Bubba was going to hurt that dog but instead Bubba body slammed the dog and pinned it to the ground and held him there. I immediately pulled him off and the Collie got up and walked to the owners who were standind about 50 feet away drinking beer by their van.