Is it ever right to restrict animals' liberty? If so, under what conditions? ‘Keeping pets and zoo animals’ investigates the ethics of keeping animals for personal or social/cultural purposes and considers the harms often imposed upon these animals. There may be circumstances where keeping an animal is regarded as necessary, such as to preserve a species or to provide a blind person with a seeing-eye dog. Discussions on such cases centre on the moral status of animals. If capacity does not always harm animals, is it disrespectful? In almost every case of captivity, animals are at least in part used for human purposes such as enjoyment, research, education, or companionship.