My Great Pyr. Koda started having trouble with the dog food brand I was feeding her. She started losing her fur. I am postive she was allergic to the corn. I changed her to Diamonds Natural "Chicken and Rice" & "Lamb and Rice". Her fur came back in and she is SO much more active and hardly poops as much as she used too. Also she eats her food more eagerly than she used to eat the other brand I used to feed her.