I know it is a different food, but i tryed flint river with jaz, and it was too nutrient dense for her, gave her the worste bout of bum blowouts i have ever experienced with a dog, it was to the point of her crying when going. So needless to say i stopped once that happened. If your pup never had problems with the water this whole time, then why do something different? Sometimes the foods are too dense for the dogs to digest properly. I did the same 1/4 cup to three of the old foods and that still set her belly in an uproar. After she ate i lied on the bed with her and listend to her stomach...the amount of air in there, and bubbles occuring ... i felt horrible, so i started her on Prozyme and it does wonders. Try giving an enzyme like prozyme or D-zyme from solid gold, it help jaz with her blowouts i am sure it will help yours.