Animal-Assisted Interventions for Behavioral Health

Animal-assisted interventions encompass a spectrum of structured and semi-structured engagements between humans and animals, designed to improve behavioural health through physical, emotional and social pathways. These interventions range from animal-assisted therapy—delivered by trained clinicians alongside certified animals—to animal-assisted activities, which are less formal and focus on general well-being. Across age groups and clinical settings, the presence of animals has been shown to reduce stress markers, alleviate anxiety and depression, enhance social interaction and support coping with chronic or acute medical conditions. Underlying mechanisms include neuroendocrine modulation, notably increases in oxytocin and reductions in stress hormones such as cortisol and chromogranin A, alongside psychosocial benefits like improved interpersonal trust and emotional regulation. Applications are diverse, encompassing inpatient paediatric wards, oncology units, trauma rehabilitation and special education, with growing attention to implementation protocols, animal welfare and safety considerations in high-risk environments. As research matures, emphasis is shifting towards standardising methodologies, defining intervention doses and elucidating long-term outcomes to establish evidence-based guidelines for global adoption.

Research from Nature Portfolio

Innovative investigations have explored robotic analogues of animal companionship in contexts where live animals cannot safely be introduced. In haematopoietic stem cell transplantation units, interaction with a robotic puppy led to significant decreases in salivary chromogranin A and modulations of serum oxytocin and cortisol, indicating stress reduction. Patients exposed to the robotic intervention also exhibited improved psychomotor activity and maintained psychological well-being despite isolation protocols, suggesting that high-fidelity mechanical substitutes can replicate key therapeutic elements of pet therapy and offer a scalable option in sterile or allergy-sensitive settings.

Animal-Assisted Interventions for Behavioral Health publication trend

The graph below shows the total number of articles in animal-assisted interventions for behavioral health across all publications each year (not limited to Nature Index journals).

Technical terms

Animal-assisted intervention: A therapeutic or activity-based programme involving trained animals to improve human health and well-being.

Cortisol: A glucocorticoid hormone released in response to stress, used as a biological marker of stress levels.

Oxytocin: A neuropeptide associated with social bonding and stress regulation, often elevated following positive human-animal interaction.

Chromogranin A: A protein co-released with catecholamines, serving as an indicator of sympathetic nervous system activation and stress.

Psychomotor activity: The integration of cognitive processing and physical movement, often measured to assess mood and arousal changes.

References

1. The supporting role of dogs in the inpatient setting: a systematic review of the therapeutic effects of animal-assisted therapy with dogs for children and adolescents in an inpatient setting. European Child & Adolescent Psychiatry (2023).
2. Feasibility, efficacy, and safety of animal-assisted activities with visiting dogs in inpatient pediatric oncology. World Journal of Pediatrics (2024).
3. Robot therapy aids mental health in patients with hematological malignancy during hematopoietic stem cell transplantation in a protective isolation unit. Scientific Reports (2024).