More: My brother in law (the guy in the photo) trained Hunter, our Jack Russell to swim and then chase a ball in the pool. Prior to this, Hunter was afraid of the water and would never get in. Once he learned to enjoy diving and swimming to retrieve rubber tennis balls, he would run to the pool and look at us, waiting for anyone to throw the ball so he could dive in. This was his favorite activity until he sadly went blind. I imagine him in Heaven giving the Labs and other retrievers a run for their money!