Bud knows that summer is over and he wants to be ready for winter. Labs are originally from Newfoundland. were the temperate is cold. The Labs are meant to swim in icy water. The fishermen used these dog to be with them in their boat and to swim to retrieve their fish nets. The dogs used their strong chest to break ice in the water.
Some how I don't think Bud would want to swim in that cold of water. He loves swimming in the bay where there never ice. Thankfully I say. I would not to live in cold, cold climate.