Well our Newfi, the breed is suppose to be livesaving dogs. We laugh, while we can get him on the steps of the pool, any further he will not move.
We have two that love to be on the steps (we have steps 1/2 way around the pool) and two who will not get in the water, although our peke loves to be splashed.
But the two large boys enjoy our pond, it isn't as intimiating.
I have often wondered if swimming is natural.