WE ENJOY FEEDING OUR DOGS THIS GREAT FOOD AND IT IS NICE TO KNOW THAT IT ISN'T FILLED WITH FILLERS OR BY-PRODUCTS, WHATEVER THAT IS SUPPOSED TO BE!I KNOW WE DON'T THINK BY-PRODUCTS ARE SOMETHING THAT BELONGS IN OUR PETS FOOD.I BELIEVE BY-PRODCTS ARE SOMETHING LEFT OVER AFTER EVERYTHING ELSE HAS BEEN PROCESSED! I LIKE THE IDEA THAT WE ARE FEEDING OUR ANIMALS FOOD GRADE MEALS THAT ARE GOOD FOR THEM. HIGHLY RECOMMEND THIS PRODUCT