I've only bonded one pair, Will and Nancy after Will's sister Poppy sadly died. Poppy and Will were "joined at the hip", I dont know who was the dominant and who was the submissive. They both groomed equally, with Poppy possibly doing a tad more grooming than Will. Nancy and Will are more like "mates" compared to how close Poppy and Will were, but I gather from the rescue they were from the same litter and were only seperated when they were neutered. Nancy appears to be the boss in the new pair, pushes Will out the way to sit/flop in a certain spot, rarely grooms him whereas he is grooming her constantly. She is bigger so maybe she's not really "pushing" him, but she'll nick treats from under him if she finishes hers first - although recently he's started trying to nick hers before he's even got his. Poor Will, when she's washing herself he puts his head right down under her in hope of getting an accidental groom - I worry he'll suffocate. :roll:He doesnt chase her though when she doesnt groom him. Sorry this is probably no help at all but just gives a different perspective perhaps.