Pet therapy is often described as comforting, heartwarming, or joyful. Although that’s true, beneath the softness of a dog resting beside someone or the gentle reach of a hand to pet an animal, something much deeper is happening: the nervous system may be receiving a safety cue.
Our bodies are constantly scanning the environment to ensure safety and support. This process happens below conscious awareness and influences heart rate, breathing, muscle tension, digestion, pain perception, emotional regulation, and our sense of connection to others. When the body perceives a threat, it may shift toward sympathetic activation (the familiar fight-or-flight response) or, in more overwhelming states, toward shutdown and disconnection. Healing, performance, and recovery all require the ability to move back toward regulation.
This is where pet therapy and the human-animal bond can make a powerful impact.
Woman’s Best Friend
Positive human-animal interaction may help reduce stress physiology and support emotional well-being. Research on animal-assisted interventions has shown potential benefits for anxiety, pain, stress, depression, blood pressure, and heart rate. While the research is still evolving and outcomes vary, one consistent theme is that animals may help create a calmer internal state.
One possible mechanism is oxytocin, a neuropeptide involved in bonding, trust, social connection, and stress modulation. Human-animal interaction has been proposed to influence the oxytocin system, which may help explain some of the psychological and physiological benefits observed in pet therapy research, as well as the comfort many people experience with their own animals.
It’s also been suggested that pet therapy may support autonomic regulation. The autonomic nervous system helps regulate functions such as heart rate, breathing, digestion, and arousal. When someone gently strokes a calm dog, makes soft eye contact with their pet, or simply sits in quiet companionship, the body may have an opportunity to shift out of “guarding” and into a more regulated state. This is not because the animal “fixes” the person, but because safe connection can change physiology, which matters for fitness, health, and resilience.
“Research on animal-assisted interventions has shown potential benefits for anxiety, pain, stress, [...] and heart rate.”
A Safe Space for All
We often think of strength as something built only through training and physical effort. However, true strength also requires recovery, adaptability, emotional regulation, and the capacity to feel safe in one’s own body. A chronically stressed nervous system can influence gut function, pain, sleep, inflammation, breathing patterns, muscle tension, and performance. Pet therapy and our relationships with animals offer a gentle, relational way to support the body’s ability to soften, reconnect, and recover.
Importantly, our pets are not tools; they are sentient companions and partners in connection. Ethical pet therapy, and even everyday human-animal interaction, must honor the animal’s well-being, provide choice whenever possible, and recognize signs of stress, fatigue, or discomfort. The most powerfully healing interactions happen when the nervous systems of both you and your pet are respected.
The human-animal bond is not a replacement for medical care, mental health support, or rehabilitation. However, when that connection is safe, respectful, and mutually supportive, it can be a meaningful part of whole-person health. Sometimes the nervous system doesn’t need more words or more effort. Sometimes it needs warmth, presence, connection, and a gentle reminder: you are safe here.
Written by Arianne Missimer, Functional Medicine Expert
Lead photo by Elaine Coale Photography
