I'm no expert but our two boys who have been together since about 10 weeks old, (now they're 5 years) play alot and it sounds like what you're describing. I think that if you don't hear any hissing or spitting and hear only low key growling that they're just playing.
Our two go at it lots of times but we're sure they're just wrestling and no one ever gets hurt or loses more than a tiny scap of fur. It's so funny to see them roll around on the floor and then see one of them walk away with a tiny fluff of fur in his mouth and 5 minutes later they're curled up together licking each other! :lol:
They have provided hours of entertainment for us!
Our two go at it lots of times but we're sure they're just wrestling and no one ever gets hurt or loses more than a tiny scap of fur. It's so funny to see them roll around on the floor and then see one of them walk away with a tiny fluff of fur in his mouth and 5 minutes later they're curled up together licking each other! :lol:
They have provided hours of entertainment for us!