Called animal euthanasia voluntary killing of an animal in order to end her suffering or prolonged agony. The term is also commonly used to describe the slaughter of animals who participated in a laboratory study (sampling, data collection), in animal husbandry fur or within the framework of the prevention of animal diseases . It is also one of the methods of control of animal populations .
In everyday language, the terms “sleep” or “end the suffering” are used as euphemisms to ease the sense of the word.