@Corinne0022 They say there is a link between potato and yeast growth. Which is a problem for us bully owners because we find that grain free greatly helpd their allergies but MOST grain free foods have potatoes in them. Natures Variety Instinct is grain free and potato free. After I swtiched to that from the other grain free foods that I had Samson on, that were very good but had potatoes in them, his chronic ear infections cleared up right away. It was amazing. I HIGHLY recommend you switch!!!