A long-shared history links humans and dogs, a relationship that began more than 15,000 years ago when early wolves sought food and shelter near human settlements and gradually adapted to life alongside people.

According to the National Association of Pet Food Manufacturers, there are nearly seven million domestic dogs in Spain, highlighting the depth of this connection.

The International Human-Animal Bond Day, observed on November 8, highlights this enduring cross-species relationship between humans and dogs. Evidence shows that human-dog interactions can shape physical and emotional health in measurable ways, strengthening a bond that has persisted for millennia.

Emotional Role

Several studies have reinforced the finding that contact with dogs provides multiple benefits for humans’ emotional health.

A study showed substantial psychosocial benefits of owning both dogs and multiple pets, suggesting their potential to promote health and social well-being in humans.

Although the human-dog bond is difficult to quantify, emerging evidence indicates that its impact is significant.

Another study estimated that pet companionship could be valued at up to £70,000 per year (€80,500) in terms of life satisfaction, a level comparable to that associated with frequent contact with family and friends.

This finding highlights the scale of the well-being benefits linked to companion animals. Pet owners reported a 3- to 4-point increase on a 7-point life satisfaction scale.

According to the Fundación Affinity Chair of Animals and Health in Spain, which studies human-companion animal interaction, pets can relieve stress, reduce anxiety, and ease loneliness in humans.

Their presence encourages a sense of responsibility and supports self-esteem by building confidence and improving their self-perception.

Pets also help facilitate emotional expression and strengthen social bonds, as many individuals share thoughts or feelings with animals that they do not express with others.

Role in Physical Health

Living and interacting with dogs also supports physical health. Walking them promotes regular exercise, improves cardiovascular function, increases respiratory capacity, and helps maintain a healthy body weight.

Studies have reported improved heart rate measures in young adults after 15 minutes of interaction with dogs. Additional findings showed that dogs and their owners exhibited synchronized heart rate variability during interactions, indicating improved autonomic regulation.

Living with dogs also supports immune development in humans. Moderate, consistent exposure to microorganisms in the environmental microbiota carried by animals has been shown in studies to strengthen immune defenses during childhood.

Early exposure to the microorganisms that dogs carry has been associated with lower rates of allergies, asthma, and autoimmune diseases by supporting more balanced immune maturation.

Therapeutic Role

Animal-assisted therapies, particularly those involving dogs, use structured interactions between trained professionals and animals to support physical, emotional, and social health.

In physical rehabilitation, these interventions enhance mobility, coordination, and adherence to treatment. In mental health, they have been successfully applied to depression, anxiety, autism, and posttraumatic stress disorder.

The benefits of the human-dog bond extend to diverse populations. Evidence from multiple animal-assisted therapy programs shows improvements in emotional, cognitive, and social well-being. These effects are especially pronounced in groups facing vulnerability, violence, or exclusion, according to the Fundación Affinity Chair of Animals and Health.

For people experiencing homelessness, relationships often carry a deeper meaning.

A 2022 report found that 74% of people experiencing homelessness consider their dogs their main source of social support.

In geriatric and palliative care, therapy dogs can provide comfort, reduce loneliness, and support patients with advanced illnesses. For older adults, particularly those living alone or with cognitive impairment, interaction with dogs stimulates memory, communication, and a sense of purpose.

In hospitals and nursing homes, dog-assisted interventions have been linked to better treatment adherence, lower perceived pain, and improved moods. Contact with animals can ease the clinical environment, reduce anxiety before procedures, and foster a calm, supportive atmosphere.

Assistance Roles

Dogs play an essential role in supporting the autonomy and safety of individuals with a disability. Guide dogs enable safe navigation and independent mobility for individuals with visual impairments in urban environments.

For those with motor impairments, service dogs can open doors, retrieve items, and operate switches, improving functional independence and supporting inclusion.

Medical alert dogs, including those trained to detect seizures and glucose changes, can recognize behavioral or physiological shifts that occur before seizures or clinically significant glucose fluctuations. Their early warnings enable timely intervention and lower the risk of developing any condition.

Lasting Bond

The bond between humans and dogs is particularly visible during moments of loss. Evidence shows that grieving the loss of a dog can lead to emotional and physiological responses comparable to those following the loss of a close human.

However, this grief is often socially minimized. Without recognized rituals or acknowledgment, many individuals face loss quietly and without support.

Losing a dog involves far more than the disappearance of an animal; for most, it marks the end of a meaningful bond that endures in memory and continues to shape their relationship with animals.

The human-canine connection highlights a consistent truth: across settings and generations, dogs offer companionship, stability, and reliable emotional support.

This story was translated from El Medico Interactivo.