I have a 1 year old Golden retriever who has a sensitive stomach. After trying Iams and Eukanuba Puppy we made the switch to the more quality California Natural Chicken and Rice Puppy formula which was great for him (firm stools and shiny coat). Now that he was ready to switch to adult formula (weighing in at 75 pounds now) I thought it sensible to choose the Adult Chicken and Rice formula by Calif. Nat. However, he has had an awful reaction even after gradually introducing the adult food with puppy food. He is itching a lot, ear infections, and chewing his paws, HORRIBLE gas, and loose stools. I do not recommend for sensitive stomach Golden Retrievers. We are going to try grain free options...