What is Pet Therapy?

Pet therapy — formally called animal-assisted therapy or animal-assisted intervention — involves intentional, structured interactions with trained animals to improve a person's mental, emotional, or physical wellbeing. It is used in hospitals, nursing homes, schools, veterans' programs, and mental health clinics worldwide. Unlike simply owning a pet, formal pet therapy involves trained handler-animal teams working toward specific health goals alongside other care.

How does Pet Therapy work?

Interacting with animals triggers a measurable biological response in humans — petting a dog or cat raises levels of oxytocin (the bonding hormone), while simultaneously lowering cortisol (the stress hormone) and reducing blood pressure and heart rate. Animals also provide non-judgmental presence, which lowers social anxiety and creates a sense of safety and calm that can be hard to achieve through talking therapies alone. The physical act of touch — stroking, holding, or grooming an animal — activates the parasympathetic nervous system, shifting the body out of the stress response.

What forms does Pet Therapy come in?

Canine-assisted therapy is the most researched and widely available form. Equine-assisted therapy (with horses) is particularly studied for PTSD and trauma. Cat therapy is common in care home settings. Formal AAT sessions are led by trained therapists using certified therapy animals. Casual pet ownership also carries documented health benefits, though the therapeutic effects are generally stronger in structured programs with clear goals.

Where it comes from:

Humans and animals have shared healing bonds for millennia — ancient Greeks recognized that horses could calm the distressed, and Florence Nightingale documented that small animals reduced anxiety in hospital patients in the 1800s. Modern animal-assisted therapy was formalized by child psychologist Boris Levinson in the 1960s, who noticed his dog spontaneously helped a withdrawn child open up during sessions. Since then, it has grown into a recognized therapeutic modality with a substantial body of clinical research.

What does Pet Therapy help with?

• Anxiety and stress: Spending time with a therapy animal reliably lowers cortisol levels and activates the body's calm-down response within minutes. Multiple trials in hospital and clinical settings show that even a single 10-15 minute session with a therapy dog significantly reduces self-reported anxiety and measurable physiological stress markers.
• Depression and low mood: Animal interaction boosts oxytocin and serotonin — two feel-good brain chemicals that tend to be low in depression. Regular pet therapy participation is linked to meaningful improvements in mood, motivation, and feelings of purpose, particularly in people who feel disconnected from others.
• PTSD and trauma: Therapy animals — especially horses in equine-assisted programs — help trauma survivors feel safe, grounded, and emotionally regulated without requiring verbal re-telling of traumatic events. Studies in veterans show reductions in PTSD symptom severity, hyperarousal, and emotional numbness after structured animal-assisted programs.
• Loneliness and social isolation: Animals provide consistent companionship and a sense of being needed, which directly counters feelings of loneliness. Pet ownership and therapy animal visits are both shown to reduce social isolation, particularly in elderly adults in care settings, and often serve as a social bridge — prompting conversation and connection with other people.
• Chronic pain: Interacting with therapy animals has been shown to reduce perceived pain intensity in patients with chronic conditions and post-surgical pain. The effect is thought to work through distraction, relaxation, and endorphin release — similar to how laughter or positive emotion can take the edge off pain signals.
• Dementia and memory decline: Therapy animal visits in dementia care settings consistently reduce agitation, improve mood, and encourage verbal and social engagement even in people with significant cognitive decline. The non-verbal, sensory nature of animal interaction bypasses verbal communication barriers.
• Autism spectrum and social difficulties: Animal-assisted sessions help children and adults on the autism spectrum practice social skills in a lower-pressure environment. Animals are patient, consistent, and non-reactive — qualities that make them ideal practice partners for learning eye contact, empathy, and emotional regulation.
• High blood pressure: Pet ownership — particularly dog ownership — is associated with lower resting blood pressure and a blunted cardiovascular stress response. Studies show that pet owners recover more quickly from stress-induced blood pressure spikes compared to non-owners, a well-replicated cardiovascular benefit.
• Burnout and emotional exhaustion: Brief interactions with therapy dogs in workplace and healthcare settings are shown to reduce emotional exhaustion and restore a sense of calm and positivity — making pet therapy a practical tool for stress recovery during demanding shifts or workdays.
• Grief and bereavement: Animals provide silent, non-judgmental presence during grief — a type of comfort many people find easier to accept than words. Pet therapy is used in hospice, bereavement support groups, and grief counseling as a gentle way to provide emotional comfort without requiring the grieving person to explain or rationalize their feelings.

What can Pet Therapy help prevent?

• Cardiovascular disease risk: long-term pet ownership is associated with lower rates of heart disease and reduced cardiovascular mortality, particularly in people who have already had a heart attack
• Social isolation in aging: regular animal interaction helps maintain social engagement and emotional connectivity in older adults, reducing risk of isolation-related decline

Which foods are rich in Pet Therapy?

Pet therapy is an experiential, activity-based intervention — it does not come from food. To support the same biological pathways pet therapy activates (oxytocin, serotonin, stress resilience), focus on: oily fish like salmon and sardines for omega-3s that support mood and reduce inflammation; dark chocolate in moderation for serotonin precursors and stress reduction; fermented foods like yogurt and kefir for gut-brain mood support; magnesium-rich foods like leafy greens, nuts, and seeds to support the nervous system's calm-down response; and a diet rich in whole, colorful plants to reduce the chronic inflammation that makes anxiety and depression worse.

What are the side effects of Pet Therapy?

• Allergic reactions (sneezing, itchy eyes, skin reactions) in people with animal allergies
• Rare risk of animal bites or scratches: very low with certified therapy animals
• Emotional distress if a therapy animal the person has bonded with retires, becomes ill, or dies
• Zoonotic infection risk: extremely low with screened and vaccinated therapy animals, but relevant for immunocompromised individuals
• Over-reliance: rarely, individuals may prefer animal interaction to human connection in ways that limit social development

Good to know:

Pet therapy has an excellent safety profile and is well tolerated across age groups, clinical populations, and settings. Risks are minimal when using certified therapy animals and trained handlers.

How much Pet Therapy should you take?

• Recommended daily: No universal dose — most clinical programs use sessions of 20 to 60 minutes, 1 to 3 times per week. Even a single 10-15 minute interaction with a therapy dog produces measurable stress reduction. For pet owners, daily interaction is naturally ongoing.
• Best time of day: Any time — sessions are often scheduled during high-stress periods (before procedures, during shift breaks, in the evenings for care home residents). Morning sessions can set a calm tone for the day.
• With or without food: Not applicable — no food timing considerations. Ensure therapy animals are not feeding-related to avoid food-related behavior issues during sessions.
• Time to effect: Acute mood and anxiety relief within a single session (10-20 minutes); sustained benefits for depression, PTSD, and chronic pain typically emerge after 4-8 weeks of regular sessions.
• How long to take it: For therapeutic goals, consistent participation over 6-12 weeks is recommended. Pet ownership provides ongoing continuous benefit. No 'cycling' is needed — regular ongoing contact is optimal.