Animal hoarding — keeping far more animals than can be adequately cared for — causes profound welfare suffering and presents complex challenges for animal welfare and mental health services.
Animals in hoarding situations typically exist in severe deprivation. Malnutrition, untreated disease, overcrowding, and social conflict cause chronic suffering that escalates over time. Cats in hoarding situations develop upper respiratory infections that cause chronic pain and blindness. Dogs may never have been socialized. Dead animals often remain with living ones. The welfare impact on individual animals can be severe and long-lasting; many never fully recover physically or behaviorally.