Animal hoarding involves accumulating animals beyond capacity to provide adequate care, resulting in severe welfare harm and requiring multidisciplinary intervention.
Animal hoarding welfare involves severe acute and chronic suffering for animals who are simultaneously overcrowded, malnourished, sick, and often experiencing the deaths of companions around them. The welfare harm is extreme and affects large numbers of animals simultaneously. The complication that distinguishes hoarding from other neglect is the mental health dimension of the hoarder: intervention that removes animals without addressing the psychological condition that drives accumulation results in replacement of seized animals and repetition of the welfare harm. Effective intervention therefore requires coordinated multidisciplinary response that addresses animal welfare, human mental health, and community safety simultaneously. This coordination between systems that typically operate independently is challenging but essential for outcomes that actually reduce animal suffering rather than temporarily relocating it.