All puppies are born understanding the right way to swim. Most adult dog can still swim, whether or not they ever had ahead of or not. the one reason a dog would not be capable to swim would be if it was once too chilly within the water, or in all probability if he swallowed a variety of water when he jumped in. Or, he may not have been seeking to swim as much as the skin- canine dive underwater identical to people. They grasp their breath and swim down to try and catch things- regularly toys, but when he saw a fish, he may've tried to get it- and then swim up when they're ready. i feel something like that is more possible than a canine 'not knowing' methods to swim.