Obedient team dogs? Both of them should look into your mouth before you pronounce anything. My humble advice: make two different balls your major training tools for two dogs at once. Decide to whom your right and left hands would belong, dogs have a strong sense of left and right. They should be ball mad for the start. A simple game with two balls when one dog is sitting and waiting for his turn, and the second dog runs after. Please, don't forget, that each dog should have his/her own toy, otherwise you would struggle with the issue of giving the priority.