The nine primates, known collectively as the "York 9," include individuals such as Hannah and Kenny, most of whom have spent over 17 years in laboratory conditions. Footage released by Last Chance for Animals in April 2026 revealed the animals living in barren cages, subjected to repeated surgeries, and fitted with permanent restraint collars and cranial implants. The investigation also noted signs of physical distress, including instances of bleeding injuries and repetitive, abnormal behaviors like swaying.

In response to the evidence, the Jane Goodall Institute reaffirmed its opposition to invasive primate experimentation, urging a shift toward non-animal research methods. This intervention carries particular weight given that York University awarded Dr. Jane Goodall an honorary degree in 2024. Chris DeRose, president of Last Chance for Animals, stated that the institute’s involvement underscores the urgent need for the university to release the animals. While public protests continue on campus, the university faces scrutiny over its $40 million investment in a new neuroscience facility, which includes plans for an expanded vivarium. A formal complaint regarding the conditions of the macaques is currently pending before the Canadian Council on Animal Care.