From LA times Blog - good 2 1/2 min video on dog hydrotherapy
"Arthritis pain? A torn ACL? A misjudged step that leads to a broken bone? Many of us have been there, and many of our pets have been there too.
Luckily for Southern California dogs and cats (and even rabbits), a Santa Monica clinic called California Animal Rehabilitation is there to help them get back on their feet (all four of them) again. "
Full story