Swimming Adventure - "bust"

The Sponge dog swimming adventure was a failure. I think I may have waited too long to introduce him to water for the first time. He enjoyed the park immensely and I have found my new fishing hole (stocked with walleye annually), but I am going to have to bring an "experienced" dog with me to teach sponge-dog how to swim. He went in, just enough to cover his paws, but freaked out a little bit when he saw the muddy bottom start washing around his feet. I am confident that he will eventually go in and like it, but he needs someone or some dog to show him how.