Enjoying your KFC grilled chicken? It might be the beef in it, according to KFC competitor El Pollo Loco. In a new commercial, El Pollo Loco's CEO stands in a pasture next to cows and announces that KFC uses beef marmalade on their chicken. KFC defended itself: beef accounts for only 0.2 percent of all the chicken's seasonings, a spokesman said. The scrappy, smaller fast food chicken chain has been picking fights with KFC since they debuted their grilled chicken product in April. They also rib KFC for grilling their chicken in an oven instead of over a flame grill.