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Hello. This is a question way outside of what I believe any of the Experts of this site can properly answer without a physical examination, palpation of the leg, etc...
If I were you Brian, well worth consulting a Equine Rehabilitation Specialist to see what physical therapy modalities would be indicated to help reduce inflammation and regain strength.
The above is one example of a contact you can inquire with, and if they cannot help you directly, they may be able to direct you in the right direction.