RT Journal Article SR Electronic T1 Baby Fae: a beastly business. JF Journal of Medical Ethics JO J Med Ethics FD BMJ Publishing Group Ltd and Institute of Medical Ethics SP 178 OP 183 DO 10.1136/jme.11.4.178 VO 11 IS 4 A1 Kushner, T A1 Belliotti, R YR 1985 UL http://jme.bmj.com/content/11/4/178.abstract AB The Baby Fae experiment has highlighted the growing trend in medicine of using animal parts in the treatment of humans. This paper raises the question of the logical and moral justification for these current practices and their proposed expansion. We argue that the Cognitive Capacity Principle establishes morally justified necessary and sufficient conditions for the use of non-human animals in medical treatments and research. Some alternative sources for medical uses are explored as well as some possible programmes for their implementation.