Oreo had knee sugery abut two months ago. As part of her rehab, she swims once a week at "Cuttting Edge K9 Rehab." The pool is heated, and they even have a platform "lift" for more seriously injured dogs who can't use the stairs to get in/out. Here are some pictures.
This is the pool:
The yellow lab is Takara. Her mom is the physical therapist who runs the business. Takara's job is to greet the clients and to be a role model for teaching new swimmers.
My happy girl resting on the platform: