Blissfulbalance,
Sorry I'm late in responding. I know of a woman in Los Angeles that has a canine massage and rehab business. Part of the rehab is water therapy.
Here is the website:http://www.twohandsfourpaws.com/TwoHandsFourPaws/Home________________.html
I stumbled upon her website by accident. One evening I was thinking back to the house I lived in when I was a kid. It was the happiest time of my life. On a whim I decided to google the address of this house. This Two Hands Four Paws came up. Well, being an animal lover/rescuer and a massage therapist, I was curious. So it turns out my childhood home has become home/business for a canine massage therapist that specializes in rehab. Her story is really interesting. Good luck to you!