"I don't know what they put in this food, but it must be good stuff. I have two picky dogs who never finished a bowl of food before. Now they eat every bite and lick the bottom of the bowl for crumbs! The small pieces are great for my Chihuahua---better than Royal Canin puppy food. This food is also preferred over the other AvoDerm foods. Buy this product, and you will never have to throw out leftover dog food again!"