Video of Dog Rescuing Kayakers?

I went to the Brookmont whitewater training course this weekend and saw a dog watching from the shore. A bunch of kids jumped in to the rapids (with all their safety gear on) to float down through the course just for fun. The dog spotted them and leapt into the rapids and swam down the course until he caught up to them. Not sure if he thought they needed help, just wanted to have fun, or wanted dog treats. Anyway, they all got out just fine and swam several more times.