How Pets Improve Mental Health: Insights and Benefits

By Sophie Kininmonth · 8 Jan 2026 (updated 21 Jul 2026) ·7 min read

How Pets Improve Mental Health: Insights and Benefits

Pets can genuinely support mental health. Living with a dog, cat, bird or even a quiet fish tank steadies a lot of people after a hard day, and there is real evidence behind that feeling. The strongest benefits tend to come from ordinary, repeatable things: touch, routine, gentle distraction, movement, and the way an animal pulls a person back into the present. They are not a treatment on their own, though, and the effect is not identical for everyone. All of that has to be balanced against the real demands of cost, time and responsibility.^{4, 5, 6}

The human and animal bond, and why it steadies people

Living alongside animals is not new. What is new is the language we use for it: attachment, social support, co-regulation, stress physiology. These are clinical terms for something most people already recognise at home, the quiet sense that another living creature is nearby, responsive, and part of the daily landscape.

In psychology, attachment theory helps explain why some people experience a pet as a steady safe base, especially during stress. Social support theory adds another layer: pets can offer companionship without the social effort that other people sometimes require, and they can make it easier to keep small routines that anchor the day.^{5, 7}

What the evidence suggests, and what it does not

Stress and anxiety

Studies of human and animal interaction often find changes in stress related measures such as cortisol, heart rate and blood pressure, alongside self reported reductions in anxiety in some settings. The findings are not universal, but the pattern is consistent enough to be clinically interesting, particularly for brief interactions like patting a dog, sitting with a cat, or structured animal assisted sessions.⁷

Mood and routine

Pets add structure in a plain way: feeding times, walks, litter trays, cleaning, veterinary visits. For some people this gentle obligation reduces the mental load of decision making and helps the day keep moving. The benefit is practical, not magical, and it depends on the person's capacity and circumstances at the time.⁵

Loneliness

Loneliness is common in Australia. The AIHW estimates that 15% of Australians were experiencing loneliness in 2023, using HILDA survey data.¹ Some research suggests that acquiring a dog can reduce loneliness for new owners, at least in the months after getting the dog, with effects that may persist across the study period. Other studies, including research during COVID era lockdowns, have found mixed or neutral results once other life factors are accounted for.^{8, 9} The honest summary is that pets can buffer loneliness for some people, and for others they do not shift it much, especially if wider stressors like housing, money, illness, grief or relationship strain are doing most of the damage.^{5, 9}

Physical health links, and why they matter for the mind

Movement is one of the most reliable non pharmaceutical supports for mood and anxiety, and dogs in particular can create a reason to walk. Evidence reviews on pet ownership and cardiovascular health suggest dog ownership is probably associated with reduced cardiovascular risk, though experts also caution against getting a pet primarily for heart health benefits.^{2, 5}

An Australian study comparing different companion animal owners found dog owners tended to do more physical activity, but the mental health links were not as simple as get a dog, feel better. It is a reminder that pets can support healthy habits without replacing the foundations: sleep, housing security, income, social connection, and clinical care when needed.¹⁰

Different pets, different kinds of support

Dogs

Dogs tend to pull life outward: walks, parks, neighbours, the steady rhythm of daily care. For people who can meet the needs of a dog, that outward motion can support mood and reduce isolation. A dog also brings the highest day to day demand, including training, exercise, noise management, and the reality that you cannot skip care when you are unwell.^{5, 10}

Cats

Cats often fit a quieter home rhythm. For some people the soothing routine of feeding, the presence of an animal nearby, and brief moments of touch are enough to soften stress. Cats can be lower maintenance than dogs in some respects, but they still require daily care, enrichment, and veterinary support.⁵

Birds and small mammals

Birds and small mammals can be engaging companions, particularly for people who want interaction but may not have the space or time for a dog. They also have specialised welfare needs around housing, temperature, enrichment and diet, and a mismatch here can quickly become stressful for both person and animal.⁵

Fish and aquariums

There is growing research interest in the calming effect of watching fish in aquariums. Some studies report improvements in relaxation and anxiety, with less consistent changes in physiological measures. The experience is often described as quietly absorbing: movement, pattern, light, and the soft passage of time.⁶

Therapy animals and assistance animals are not the same thing

In Australia these terms get blurred in everyday conversation, but in practice they mean different things.

Assistance animals are specially trained to help a person because of disability, and are not the same as pets or companion animals.³
Animal assisted therapy is a structured, goal directed service delivered by a therapist who includes an animal as part of treatment. The animal usually belongs to the therapist or therapy organisation and does not live with the client.⁴

This distinction matters because expectations can quietly drift. A beloved pet can be supportive, but it is not automatically a therapy program, and it is not automatically trained or suitable for high stress environments like hospitals, schools or aged care.^{4, 5}

What to weigh up before getting a pet

The mental health benefits of pet ownership are easiest to feel when basic care is manageable. When care is not manageable, a pet can become another source of pressure. A few honest checks prevent regret:

Energy and time: can you reliably meet daily care on your worst weeks, not just your best ones?
Money: food, registration, parasite prevention, grooming and veterinary costs are ongoing, so plan for emergencies as well.
Housing: pets can limit rental options, so check the rules before you commit.
Support network: who can help if you are in hospital, travelling, or unwell?
Fit: match the animal's needs to your actual routine, not the routine you hope to have later.

If your mental health is fragile, a pet may still help, but it works best alongside support that does not depend on you being on every day. For some people, fostering, pet sitting or volunteering can offer the benefits of contact with animals without the full weight of long term responsibility.

Final thoughts

Pets can be quietly powerful companions. They can ease moments of stress, add a simple routine, and soften loneliness, especially when life has narrowed. The effect is real for many people, but it is not guaranteed, and it is not a substitute for care that addresses the bigger drivers of mental health. The best choice protects both sides of the bond: an animal whose needs you can meet, and a life where their presence makes the days steadier rather than heavier.

References

Sophie Kininmonth

Dog lover and writer at My Pets Australia, sharing practical breed guides and care advice for Australian pet owners.