Our large breed is highly active and when we've had a friends pup visit in the past she spent ages playing with the pup whereas our old boy wasn't interested.
Our old boy is not active at all really. He's very good at being dominant (low growl get out of my spot to female, and she obeys).
Our current dogs have their own favorite spaces, we'd have to either get a crate or have a space we can set aside for the pup to give him/her, and current dogs a break.
Appreciate your advice!