I was wondering about hydrotherapy as well. The dog walks on a treadmill in warm water. The water provides bouyancy and is soothing. It may be worth exploring if something like this would help her? It is very similar to physical therapy offered to humans. The places which offer this also typically offer other types of pysical therapy and may also teach you some massage techniquest o help relieve muscle tension. Again, no idea if these things are appropriate for her, that is what you would want to learn first.