A Restricted Use Protein Product (RUPP) are mammalian protein products within the meaning of the federal rule (21 CFR § 589.2000) governing the feeding of certain prohibited mammalian proteins to ruminants. These include over 20 different animal protein products including ruminant meat and bone meal, meat meal, bone meal (from ruminants), and leather meal (from ruminants, among others. For a complete list of these restricted use protein products, please visit the FDA website at http://www.fda.gov/cvm/guidance/guidance68.pdf (page 9). Additional information regarding this rule in found at the FDA website also http://www.fda.gov/cvm.