Animal Hoarding: When Love Becomes Delusional
There are some key differences between animal and object hoarding.
Posted November 22, 2025 | Reviewed by Margaret Foley
Last year, I wrote about animal hoarding . In part, this was spurred by an animal hoarder I knew, the daughter of a friend. Her hoarding was not so extreme that the animals suffered. Still, I wondered why it happened and if there was a reason she slipped into hoarding animals rather than objects. A paper by Frost et al. provides some answers. The key differences the authors identified included the following.
Awareness of the Problem
While object hoarders often have limited insight into their situation, animal hoarders often display even less. They tend to be disconnected from reality in this regard. The animals that they have gathered may be sick, dying, or dead, yet they sincerely believe they're providing excellent care. Some researchers have observed that 43 percent of people with high levels of pet attachment exhibit clinical levels of dissociation, a psychological state characterized by a sense of disconnection from immediate experience. This dissociation may explain how someone can genuinely believe they're helping animals while surrounded by suffering.
Health and Safety Issues
While object hoarding creates fire hazards and mobility problems, animal hoarding poses unique biological threats. Urine and feces accumulate, creating dangerous ammonia levels. Disease spreads among overcrowded animals. The public health implications extend beyond the home; eventually, diseases of animal origin can affect neighbors and communities. Research comparing complaints to health departments found that animal hoarding resulted in significantly more unsanitary conditions than object hoarding and posed greater threats to human health.
The Demographics of Animal Compared to Object Hoarders
Seventy-six to 83 percent of animal hoarders are women. Roughly half are 60 or older. (Object hoarding has a more balanced gender distribution.) The average duration of animal hoarding behavior spans over two decades in some studies, suggesting these patterns become deeply entrenched over time.
The Delusional Element
Animal hoarders often develop what clinicians describe as a "mission.” They believe they're uniquely qualified to save these animals, that no one else can care for them properly. They see themselves as rescuers, not as people causing harm. This savior complex creates a psychological barrier that makes intervention extremely difficult. Some professionals have identified distinct subtypes: overwhelmed caregivers (people who started with good intentions but lost control), mission-driven hoarders (those on a crusade to save animals), and exploiters (who use animals for profit or personal gain).
What drives someone to accumulate dozens of suffering pets while believing they're a hero? Research suggests that animal hoarding operates differently from collecting objects. These individuals often experience a profound mental disconnect. Nearly half demonstrate clinical dissociation, allowing them to perceive neglect as nurturing care.
The typical profile skews older and predominantly female, with behaviors that last for decades. Many develop a "rescue mission" identity , convinced that only they can save these animals. This makes intervention exceptionally challenging since the rescuer is not only asking someone to clean up, but they are also pulling apart their core sense of purpose. Meanwhile, the biological hazards extend far beyond cluttered hallways, potentially endangering entire neighborhoods.
Frost, R.O., Patronek, G., & Rosenfield, E. (2011). Comparison of object and animal hoarding. Depression and Anxiety, 28(10), 885-891.
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Shirley M. Mueller, M.D., is a neuroscientist board certified in neurology and psychiatry. She is also an avid collector. Combining these two disciplines, she wrote Inside the Head of a Collector: Neuropsychological Forces at Play.
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This article is part of the Bringwise Psychology Journal — daily insights on human behavior, mental health, and personal growth.