Chicken fat is fat obtained (usually as a by-product) from chicken rendering and processing. Of animal-sourced substances, chicken fat is noted for being high in linoleic acid, a beneficial omega-6 fatty acid. Linoleic acid levels are between 17.9% and 22.8%.[1] It is often used in pet foods, and has also been used in the production of biodiesel. Chicken fat is one of two types of animal fat referred to as Schmaltz, the other being goose fat.