In a post on Facebook, the Aalborg Zoo in Denmark asked people to donate unwanted pets that would be “gently euthanized” and fed to predators in captivity. This bill could slow it down For most pet primates in the United States, life is marked by chronic stress, malnutrition and illness — if they survive at all. Captive carnivores in the United States often have their diets supplemented with commercially available meat products, like chunk or mincemeat. “The problem with just feeding lions meat is that the offal (liver, heart, etc.) The difference in American and European zoo practices has been highlighted before, particularly in the case of Denmark.