Pain can be caused by so many things. If it's leg pain, it could be a strained muscle, a cramp, or too much activity too soon. Maybe his back is bothering him from learning to walk as a Tripawd. It's so hard to know. Maybe another visit to the vet would be helpful...sometimes they can see things in the gait or movement that we don't that tells them whether it's a leg, back, hip, etc.

Is Marshall taking enough pain meds? Sometimes the vet prescribes the lowest dose, but there is room for increasing. You should ask. Also, it might be better to try to stay ahead of the pain instead of waiting until he's already hurting...at that point it's harder to control. My dog, Seven, has severe arthritis in his neck and back. He has flare-ups and when they happen his vet has me give him the max dose of meds and then slowly taper off over a month or so to make sure the episode has passed.

I hope you get this figured out and Marshall is feeling better soon.

Hugs,
Carol