My pup, now an adult dog of 11 pounds won't eat anything else. I am a dog lover and owner for over 50 years and I know how to slowly switch from one food to another. WELL.... forget that. We were doing fine until about 2 months when the food became a little more than 1/2 of the "new" food. That's when the pooch sat his self down stared at the bowl and then at me and..... kept sitting. He refused to eat in the am and only ate 1/2 his evening meal out of shear hunger. This went on for 3 days. So, I dumped out the "Mixture" and replaced it with nothing but this Canidae dry dog food topped with a dollop of plain yogurt (yes he's absolutely spoiled - great for digestion) and he stood, cocked his head and promptly ate his breakfast.