Castoreum Castoreum Castoreum is a yellowish exudate from the castor sacs of the mature North American beaver ("Castor canadensis") and the European beaver ("Castor fiber"). Beavers use castoreum in combination with urine to scent mark their territory. Both beaver sexes have a pair of castor sacs and a pair of anal glands, located in two cavities under the skin between the pelvis and the base of the tail. The castor sacs are not true glands (endocrine or exocrine) on a cellular level, hence references to these structures as preputial glands, castor glands, or scent glands are misnomers. It is used as
Animal welfare and rights in South Korea the lives, safety, and welfare of animals and to promote the emotional development of people so as to respect the lives of animals by providing for matters necessary to prevent cruelty to animals and to protect and manage animals appropriately". The law prohibits cruelty against vertebrates such as cattle, horses, pigs, dogs, cats, rabbits, chickens, ducks, goats, sheep, deer, foxes, and mink, but excluding fish, crustaceans, and other animals commonly used by humans. Cruelty includes killing an animal by a cruel method or in public or in the presence of an animal of the same species; injuring an animal with