We first went to flyball class at a local dog trainning center. The person who taught the class asked us to join the team after she saw Moorea. And we have been with the team ever since. Moorea has had problems holding the ball especially when it gets hot outside. I don't think it would be a problem to train a deaf dog, if they can follow hand signals. Moorea knows hand signal commands. Trainning does take time though especially with this breed they mature alot later than other dogs.