The realized promise of xenotransplantation seems to be quickly approaching, following the medical breakthrough of a pig kidney functioning for a record two months in a deceased human body. This milestone has received overwhelmingly positive media attention. Ethicists, physicians, and transplantation specialists have shared their apprehensions about the risks of implanting animal-grown organs into humans. However, conspicuously absent from these discussions is a major stakeholder: the animals.

The use of animals in medical research has been a hotly contested moral issue for years. In 2010, the European Union banned virtually all research on great apes (gorillas, bonobos,...

On August 4, the National Institutes of Health called for public comment on proposed changes to its guidelines governing the funding eligibility of research involving human-nonhuman chimeras. Although the term...