Cobain and Rigby have both lived in 2 different apartments with me.
One was a 1 bedroom, 1st floor apartment for 1 year. The second was this summer for 4 months in a 2nd floor smaller apartment.
The first apartment backed onto a large park with a little wooded trail and a football field. So each day before the kids left for school we'd take a run in the trails, and then a few hours later would practice disc or fetch once they were all at school. (Park was a popular shortcut for the kids going to school).
The summer was more difficult. Very industrial area and not many green spaces. But they still did quite well.
They're both relatively quiet, both incredibly adaptable. And really, I have found that Rigby is much happier when she lives in the apartment. The structure of everything seems to help her.
Oz and Ruby have both stayed in both apartments for varying lengths of time. Ruby has SA, I'm not sure how bad it is now, but when she stayed with us she would scream and cry when we left.
Oz whines at the door, barks at things, and for some reason he loses all house manners when he's in one of my apartments.