For many people, an animal is steady company and a reason to keep a routine. For some people with mental-health disabilities, those everyday effects may reduce the impact of symptoms or make daily life more manageable.
An ESA will not help everyone, and animal companionship has not been proven to treat any particular diagnosis. The research on human-animal interaction is promising in some areas and mixed in others. Research focused specifically on legally designated emotional support animals remains limited.
Ways an animal may provide support
Companionship and connection
An animal may provide a consistent social presence, especially for a person who lives alone or experiences isolation. A systematic review of companion animals and mental-health conditions found that participants often described animals as a source of emotional support, connection, security, and help during crises. The review also found negative experiences and called for stronger research.
Routine and daily structure
Feeding, walking, grooming, and caring for an animal can create predictable daily tasks. For some people, that structure may support sleep schedules, activity, self-care, and engagement with the outside world.
Routine is not automatically therapeutic. When symptoms are severe, animal-care responsibilities can also become stressful. A realistic care plan is essential.
Grounding and emotional regulation
Some people report that touching, watching, or interacting with an animal helps redirect attention during distress. An animal's presence may provide a calming focus or help a person recognize and move through an emotional episode.
A task-trained dog that takes a specific action during a panic attack may qualify as a psychiatric service dog rather than an ESA. The difference is explained in ESA vs. Psychiatric Service Dog.
Physical activity and time outdoors
Dogs may encourage walking, outdoor activity, and contact with neighbors. These effects depend on the species, the person's mobility and environment, and whether caring for the animal is safe and sustainable.
A sense of purpose
Caring for another living being can create responsibility, meaning, and a sense of being needed. This can be valuable, but the animal should not carry an unrealistic burden for the person's safety or recovery.
What ESA-specific research shows
A 2022 longitudinal pilot study by Janet Hoy-Gerlach and colleagues followed 11 adults with serious mental illness who were matched with shelter dogs or cats through an ESA placement program. Participants showed improvements on several measures and described benefits from the relationship.
The study is important because it examined ESAs directly, but it was a small pilot study without the size or design needed to prove that ESAs caused the improvements or that the results apply broadly. It should be treated as preliminary evidence, not a final answer.
What broader pet research shows
Broader research on pets and mental health is much larger than ESA-specific research, but its findings are not uniform.
- A systematic review of pet ownership and quality of life found inconsistent results across populations and study designs.
- A review of companion animals for people with mental-health conditions found recurring reports of support and connection, while also identifying burdens, grief, housing problems, and care responsibilities.
- A 2025 systematic review of 116 studies found that stronger pet attachment was associated with better outcomes in some studies and worse or neutral outcomes in others. The direction of the relationship may depend on the person, the animal, the type of attachment, and the surrounding circumstances.
- The National Institutes of Health describes human-animal interaction research as developing and notes that results have been mixed.
Pet ownership studies are not automatically ESA studies. A person who chooses a pet, a person who already has an animal, and a person who receives a disability-related accommodation may differ in important ways.
Possible downsides
An animal can create or increase:
- financial strain from food, veterinary care, housing, and emergencies;
- stress when the animal has behavior or health problems;
- conflict with housemates, neighbors, landlords, or family;
- sleep disruption or limitations on travel;
- fear about the animal's illness or death;
- guilt when the person cannot meet the animal's needs;
- grief after the animal dies;
- risk of injury, allergies, zoonotic disease, or property damage.
These concerns do not cancel the possible benefits. They are part of an honest assessment.
An ESA is not a replacement for care
An animal may be one part of a person's support system. It should not be presented as a cure or as a substitute for appropriate medical or mental-health care.
A clinician considering an ESA should evaluate the person's functional impairment, the role of the animal, likely benefits and burdens, the person's ability to care for the animal, and the animal's welfare. See ESA Letters and Documentation.
Questions to consider
- What specific symptoms or functional limitations does the animal help with?
- Is the benefit consistent or only occasional?
- Can the person care for the animal during a difficult period?
- Is the animal comfortable and safe in the proposed environment?
- Could the responsibility worsen stress or financial instability?
- What other supports are available?
- Is a task-trained psychiatric service dog more appropriate?
- What will happen if the animal becomes ill, dies, or cannot remain in the home?
When to seek more support
If symptoms are worsening, daily tasks are becoming hard to manage, or caring for the animal is adding strain, speak with a licensed mental-health professional or another qualified healthcare professional. An animal can be part of a support plan, but it should not be the only plan.
Sources
- Hoy-Gerlach J, Vincent A, Scheuermann B, Ojha M. Exploring Benefits of Emotional Support Animals: A Longitudinal Pilot Study With Adults With Serious Mental Illness
- Brooks HL et al. The Power of Support From Companion Animals for People Living With Mental Health Problems: A Systematic Review and Narrative Synthesis
- Scoresby KJ et al. Pet Ownership and Quality of Life: A Systematic Review
- Northrope K et al. The Relationship Between Attachment to Pets and Mental Health and Wellbeing: A Systematic Review
- National Institutes of Health, The Power of Pets
- American Veterinary Medical Association, Human-Animal Bond
- Foltin S, Glenk LM. Current Perspectives on the Challenges of Implementing Assistance Dogs in Human Mental Health Care