Many dogs may benefit from swimming therapy, underwater treadmills, and other alternative type therapies like chiropractic , acupuncture etc. These things can be used for a large variety of issues;
such as:
HD,
torn ACL,
arthritis,
extremely obese animals,
amputees
and more
Consequently, while helping out a member on another forum I found this great site.
The below link lits many places that offer hydrotherapy in the U.S.A, Canada, and United Kingdom.
http://www.mzjf.com/pools.html
I personally took one if mine who was stepped on as a pup for hydrotherapy and found it very helpful. I also got to watch others coming in for various reasons progress through there issues. It was pretty amazing IMO.