Bear with me, I'm new to this multi-dog household thing.
The puppy has been here just over a fortnight. For the first few days, Jas was distinctly growly/snappy/lunge-y. Then, he ignored him entirely. Now, he wants to play. They play tuggy with various toys (which usually involves the pup being whizzed around the floor like a mop), which is fine. They also gently mouth and roll about a bit (also fine). However, today they have started more 'vocal' play. It looks quite rough to me. Jas will mouth the entire pup's head, bark, growl etc. The pup will hide behind my legs, and then leap at his face, bite his ears, growl, snarl etc. No injuries to either party, but the occasional yelp from either dog as a tooth catches something delicate. When it all feels like a bit much, I am sending Jas to his bed and putting the pup on his blanket with a chew to cool down. Jas gets very excited during these sessions and I see his 'prey face' (Total and utter focus, dilated pupils etc). Is this normal? Should I intervene? Or am I better off letting them get on with it? Any advice appreciated.