So, I am beginning the journey to find a second dog. But I have no idea what would breed would work for me, I have some breeds I like but not sure if they would do well. So to explain, first, I live in an apartment with my fiancé, we both talked about it and want a big dog, I have a senior jack Russell and chihuahua mix, but she is now too old and tired to join me when I go out to rollerblade. My apartments do not have a weight restriction for dogs. But I am worried about the energy level of another dog, I am wanting something that will be calm in the apartment but will have the energy to come with me when I go rollerblading and can go on longer walks with me(my senior only makes it about 4 blocks before she gives up on the walk). My fiancé really wants something like a lab or rotty, but all of those breeds I met are ridiculously hyper. Anyone have suggestions?