Hi FH
I feel your pain! My 19 y.o. gelding damaged his suprascapular nerve in July 2010. He is completely herd bound with his 18 y.o. brother, so when he started stall rest we took round pin panels and made him an outdoor stall. After a couple weeks of this he was happy to move into the barn without his brother.
My pony had extensive swelling in the shoulder which we treated with a course of steroids. Vet also gave us Surpass, but we found rigging up our own Back on Track shoulder guard much more effective at reducing the swelling. (We pinned no-bow wraps to a mesh shoulder guard).
My pony started electro acupuncture 2 weeks after his injury. Also, he saw a chiropractor but they said there was not much they could do. I was lucky the DVM who did the acupuncture kept her horses at the same barn and my pony was done every other day for a couple weeks, then we trailed off, as she felt the further from the time of the injury the less effective it would be anyway.
Once the swelling went out of his shoulder we eased him back on full turnout. I believe this helped combat the muscle atrophy but I think this is something your horse will tell you if he/she is able to do.
My pony was also on chinese herbs, equi-shure and the occasional bute when he seemed really ouchy.
It was a pretty depressing process as he made leaps and bounds the first two months or so, and then sort of plateaued for a while. Then after Thanksgiving he would have moments where he would look sound.
I started taking him for walks around Christmas. January he got the go ahead to drive again. We have progressed to trotting a bit. He is older too, so I have had to make sure his other parts are okay too. His hind end bothers him now too, I think from compensating. Overall, he is doing really well and it doesn’t really matter if he goes back to normal work except that he is super fun. I think he will though.
Swimming was also recommended to me, but I was unable to find somewhere that I could swim him in the winter. I decided against underwater treadmill because I thought it would be too hard.
What part of Florida are you in? Part of the problem I had when this happened is no vets have seen this injury and there is not tons of information. (The vets at NC State video-ed my pony because “we see it in books but not in real life”). The vet that treated my guy works in Florida sometimes, let me know if you want her contact info.
Hope this helps.