The reintroduction of grey wolves to Yellowstone National Park in 1995 is one of conservation's great success stories, but it also raises important questions about the welfare of individual wolves in recovered populations.
Individual wolf welfare in Yellowstone reflects the broader realities of wild existence — significant suffering from disease, predation, inter-pack conflict, and starvation is endemic. Mange outbreaks cause intense pruritus (itching), hair loss, secondary infections, and can be fatal without intervention. The decision about whether to treat mange in wild wolves involves difficult tradeoffs between individual welfare and natural process. Subordinate wolves experience chronic social stress and may be driven from packs, reducing their survival chances. Despite these hardships, wolves in Yellowstone show complex social bonds, play behaviour, and apparent positive welfare states — evidence that their rich social and physical environment supports genuine wellbeing even amid the challenges of wild life.