I had a lab/GSD that loved the water and would go
swimming on her own.
One day I was swimming at a friends house and my
pup was so worried about me, she panicked and jumped
in the pool to grab me to try to get me out.
That was her first time ever swimming for her, and she loved
swimming ever since than.
Now the 3 dogs I have now, would let me drown before
they go swimming.
Pepper doesn't even like to get her feet wet, but
Rocky and Sheba will go into the water only
up to where the water reaches the bottom of their tummy's.

(that's a great idea, see if he will go swimming with lady)