Chimpanzees used in biomedical research face complex welfare challenges as they age, with retirement to sanctuaries a welfare priority for animals who can no longer be released to the wild.
The retirement of former research chimpanzees represents a genuine welfare success story — the recognition that highly intelligent, social primates deserve better than lifetime confinement in research facilities — but also an ongoing welfare obligation. Chimps that spent years or decades in small cages, sometimes alone, require significant social rehabilitation before they can form the complex relationships that define chimpanzee life. The sanctuary transition process, if done carefully, allows animals who have experienced profound deprivation to experience some approximation of normal social life. The funding and capacity constraints that keep hundreds of chimps in research facilities while awaiting placement represent a concrete welfare gap that government and philanthropic funding can address.