A Bernese Mountain Dog fetches a bumper as part of WET DOG training

A Newfoundland tows a person to shore in the swim with handler exercise.

Yes, the little dogs CAN do this! Here's a ten pound Chinese Crested towing a 200 pound handler to shore in the swim with handler exercise. (His handler is helping a bit by kicking lightly, but the dog is providing most of the movement and all of the direction).