Interesting from a canine perspective - dachshunds (and I'm sure other dogs) are often prescribed gabapentin, among other drugs, to help with back problems, and help alleviate the pain from them. Out dachshund bad back surgery in 2016, and used gabapentin on and off for a few years prior to needing surgery, and iirc also immediately after surgery during recovery. (Thankfully hasn’t needed it since though!) He tolerated the underwater treadmill during recovery, and it helped significantly. Makes me wonder if vets who deal with these kinds of issues have suspected the connection all along with gabapentin+spinal damage+treadmill work=improved outcomes.