Hello and welcome! As we like to say around here, Hoppy Christmas! 

You are really observant about your Tripawd, and that's great. How old is your dog? And what kind of breed? Why (and when) did your pup lose the leg? Just wondering and it may also help us give you better insight about what to expect. 

It can be challenging having a Tripawd on hikes or even neighborhood walks with other four-legged dogs. You're right, it's a lot of work to keep up on three legs and eventually that kind of activity causes issues like joint stress, muscle strains and sometimes worse. The best thing you can do for your Tripawd is 1) get an evaluation by a canine rehabilitation therapist (the Tripawds Foundation may even pay for your first rehab visit !), and 2) invest in a good dog stroller for those longer hikes. We have many stroller reviews in the Tripawds Gear blog and you'll see that many can go off-road. I encourage you to check them out. 

Even if you don't think your Tripawd needs to see a rehab therapist now, it's really just about our education as pet parents. That way we know where our pup stands physically, and what we can to to help them stay fit and injury free. 

I hope this helps. Can't wait to hear more about your pup!