Jack you made a very good point. Swimming does seem like a waste of time and to top it off like Skipper said they might end up drinking too much water. It'll also build muscles, making the dog smaller than it's opponent. My dog that loved to swam was catch weight so i could see where it worked to his advantage. He was a pre-potent, DG dog who also had a freak mouth where everything he touched wont last no more than :20 minutes. Man I missed that boy! Maybe a swimming keep worked so well for him I just can't see the disadvantages.