very cute! He really is a sneaky kid! hahah
Great to see he is recovering well!
Here is a link to some videos of Teddy Bear when he was doing the treadmill. I don't think the way they rig theirs, the pups can do what he did....you might want to share it with your physical therapist. There is a thing across the top and the leash that comes straight down is attached to it...not sure if that is clear. The last video is the best.
Yorkie Haven Rescue