When switching your dog to a new food, we recommend doing it gradually. Switching your dog’s food too quickly could lead to vomiting or diarrhea. Gradually add Providog to your dog’s current daily portion in this ratio:Day 1-2: 25% Providog mixed with 75% old foodDay 3-4: 50% Providog mixed with 50% old foodDay 5-6: 75% Providog mixed with 25% old foodDay 7+: 100% Providog