
Hydrotherapy pools are springing up in all sorts of places, I have two within a 15 min drive from my home. One I would use and the other I wouldn't. The one I would use your first appointment is always with the qualified physio and the dogs programme is set out, it is only ever the physio or the other girl who is a trained hydrotherapist that actually "swim" the dogs. Lots of people start with dogs who require it for health reasons but then continue swimming for exercise or fun when the dog is better.
There are a few vet practices who now have there own pools but not always manned by qualified hydrotherapy staff. I know some places shower dogs before and after going into the pool but I know there are more that don't.
There's a good one in the Edinburgh area run by an animal physio which is well spoken about.