My dog Muttley has mobility issues. Due to a combination of hip displasia and some neurological problems, her left rear leg has become unreliable. She can walk on it, but only on some surfaces and only for a few steps.
When she was younger she was incredibly energetic, a terror to anyone who knocked on our door, and the scourge of smaller animals. So it's been particularly difficult for her to put up with our efforts to help her around. And by "difficult" I mean that she thinks we're incredibly annoying, not nearly reliable enough, and hopelessly slow. For our part, both my husband and I were exhausted with the effort.
Enter Walkin' Wheels, a wheelchair designed for disabled pets. It took us about a week to get Muttley to use hers, but the training effort paid off, and now she loves her wheels and relies on them. Every day her walks become a little longer. But don't take my word for it: just check out this video of her returning from a walk through our neighborhood. She's starting to get a little tired, but some of her enthusiasm still shows: