Ordered directly from PetFoodDirect before I saw the negative reviews here.  So after delivery, I decided I would make the transition slowly.  A week and a half later, I was feeding approx half old and half new, and one of the dogs started vomiting/had diarrhea, had no appetite, and was lethargic.  I'm switching him to a plain chicken and rice diet, but if he doesn't get better soon, I'll have to take him to the vet.