Except horns and hooves are made of keratin... not bone or collagen.DevilDan wrote:From wikipedia:Gelatin (from French gélatine) is a translucent, colourless, brittle, nearly tasteless solid substance, derived from the collagen inside animals' skin and bones. It is commonly used as a gelling agent in food, pharmaceuticals, photography, and cosmetic manufacturing. ... Gelatin is an irreversibly hydrolyzed form of collagen. Gelatin is classified as a foodstuff, with E number E441. It is in some "gummy" candies as well as other products such as marshmallows and some low-fat yogurt.