I don’t think there are any pet strollers that could accommodate a grown Leonberger, but there are certainly pet strollers that accommodate pugs and mini-Australian shepherds. We bought a stroller, for our old pug Daisy. She’s got arthritis and in addition she easily get tired. Our mini-Australian shepherd Rollo frequently wants to sit in the stroller too but not because he is tired, its because he heard a strange sound and feels safer in the stroller.
This morning our stroller broke. The front wheel suddenly caved, and the stroller took a nosedive with Daisy in it. Daisy slid from the back of the stroller to the front but luckily, she did not fall out. She was fine. Rollo, who was watching the misadventure, was not fine. Seeing the stroller capsizing with Daisy in it really scared him and he let out a scream, eeeeek!
I left the broken stroller on the sidewalk and walked home with the dogs, carrying Daisy part of the way. After I dropped off the dogs, I took my car and returned to where I left the stroller to pick it up. However, it was gone. Who would steal a broken stroller? I had been gone for maybe 15 minutes. I had also left a bag of dog feces in the stroller basket. I always pick up after my dogs. So, I don’t think the stroller thief got a good deal.