I started my lab on purina pro plan puppy savor chicken and rice when we brought her home. I switched to the savor adult chicken and rice formula, she loves it. She eats all of her food with in minutes and has had nothing but firm stools. I train at least 4 days a week with her, and a bulk of it is water based training. I was considering transitioning her to the sport all life stages for more protein as the season gets closer. Is this a good idea? If the dog likes what she has been eating should I even bother?