The Island of Dr. Moreau, 1977. It stars Burt Lancaster, Michael York, Nigel Davenport, Barbara Carrera, and Richard Basehart, and was directed by Don Taylor.
Actress Barbara Carrera claims there were three or four different endings imagined, including one in which her character gave birth to a kitten. That version was favored by producer John Temple-Smith, which actor Michael York flatly refused to do. Director Don Taylor said that he did not take it seriously and the footage was never shot.