We appreciate your feedback. We could not tell by your post if you had done a gradual transition or not. We generally suggest doing a 7 day transition as this allows them time to get used to the new flavor and ingredients. This can also help ward off against any sort of tummy trouble. You can learn more on this transition on our website at: https://www.hillspet.com/dog-care/nutrition-feeding/how-to-transition-my-dogs-food. All of our products are 100% satisfaction guaranteed. If you would like to take advantage of this guarantee, please return the unused portion of the product to the place of purchase for a refund or exchange.