Many of the sanctuary’s primates have spent their lives as subjects for laboratory testing and several are currently on the list of threatened or endangered species. They were given to the sanctuary by private owners, veterinarians, SPCAs and medical labs or received from zoos located throughout the United States. Some were rescued from severely drastic situations and others reached the sanctuary through recommendations from primatologists. The primates, whose former owners were not interested in keeping them or viewed them as no longer of any value in the field of entertainment or other venues, are provided with shelter, food, medical attention and an enriched environment.