We have Guinness, a 15-month old Rottie+Husky, and Zoey, 4-month old yorkie, and they get along just fine! Guinness is very gentle and patient while playing with Zoey. In fact, if we have to pull them away from playing, it's because of Zoey; she gets so into playing and aggressive enough to bite his ears or collar. They both share their toys and sometimes will each from each other's food/water bowls. They always walk together around the neighborhood! At night, Zoey will sleep in my room while Guinness sleeps in another room. It's too cute, they'll even look for each other in the mornings right after waking up!