My house consists of my 3yo intact male miniature poodle, my boyfriend’s two spayed standard (8yo) and miniature (4yo) poodles and our roommate’s 14yo intact female lab (just ‘never got around to’ spaying her, she’s never been bred). In the next year or so, after a final litter, we will be adding another female mini who is the sister of the female and the mother of my male. Our two know her and see her on a fairly regular basis.
Our minis are the best of friends and spend the majority of their days wrestling and pestering one another.
The ancient lab is just kind of ‘here’. She will play with the humans in short bursts if you get her riled up, but largely just ignores the other dogs in a very ‘la la la if I don’t look at you, you don’t exist’ kind of way.
The standard wants to be with the minis and seems to relate to them in a mother kind of role more than anything else. She doesn’t often play with them, but will occasionally be enticed to hold onto the rope toy while she’s lying on the couch so one of the minis can tug on it with all their might. She will relentlessly fetch a ball when playing with a human though.
The female mini is the terrorist and ruler of all. If she wants something one of the other dogs has, she will march up and just take it from them. They’ll growl and try to hang onto it for a moment or two, but ultimately she wins every time. When she takes things from the standard, the standard looks at the humans with a, “seriously?! Why do you make me put up with them?!” look on her face.
Poodles and labs are both in the retriever category and tend to get along with other dogs so I’m not sure our household’s experience would translate well to someone with, say, a bunch of terriers or something with significantly ‘harder’ personalities.