We have 3 working collies who live together outside. Until recently, it was Top Dog who was the boss, ruling the roost over Old Boy and Young Pup. But there seem to be changes and Young Pup seems to be asserting her authority more, challenging Top Dog, starting a few scraps etc.
We're reluctant to separate them as they generally live peacefully together, they have a large unrestricted shared space but each have their own sofas, beds etc. They do eat communally though which would probably be the easiest to thing to separate if necessary..
Is this just normal pup growing up stuff? She's 2.5 yrs now so I would have expected this a bit earlier. She's never had a full season and is a bit of a baby though. Presumably, they'll sort it out amongst themselves eventually?