News Release

Research suggests canine companionship helps calm children undergoing cancer treatment

Ongoing study of animal assisted interventions at five hospitals fetches first solid data showing how therapy dogs can affect the stress levels of pediatric cancer patients and their parents

Peer-Reviewed Publication

American Academy of Pediatrics

WASHINGTON, DC - Although survival rates for children diagnosed with cancer have increased dramatically over the past 40 years, hard evidence of proven psychosocial benefits to improve quality of life among patients and families during treatment has remained elusive.

Many hospitals have therapy dogs who visit with patients, and anecdotal evidence underscores the positive impact these programs have on children with cancer and their families. Preliminary findings from a new, multi-center trial provides some of the first quantitative data to validate these claims.

The study, to be presented at the American Academy of Pediatrics (AAP) National Conference & Exhibition in Washington, DC, collected data on blood pressure, pulse rates and anxiety levels of children before and after a weekly visit from a therapy dog. During the visits, children pet or talk to the dog, brush its fur, view the dog's photos, watch the dog practicing tricks or commands, and learn about dog breeds.

Preliminary findings show that blood pressure readings in the group receiving animal-assisted interventions remains more stable across all sessions than in the control group, said lead researcher Amy McCullough, Ph.D., National Director of Humane Research and Therapy for the American Humane Association. Similarly, there was a higher degree of variability in heart rate within the control group patients than with the treatment group patients.

"These findings suggest that the dog may have a calming effect on the patient," Dr. McCullough said.

Even as animal-assisted interventions happen daily in today's pediatric oncology settings, rigorous studies of the effectiveness of pet therapy programs patients are lacking. This national, multi-site study is the first of its kind to rigorously measure the psychosocial effects of the encounters, McCullough said.

To date, 68 children ages 3 to 17 who are newly diagnosed with cancer have been enrolled in the study, including 39 in the treatment group and 29 in the control group --roughly half the amount expected to participate by the time the study concludes in 2016.

In addition to the effects on pulse and heart rate to date, preliminary results indicate the canine encounters appear to improve anxiety levels among parents. Parents in the control group report fluctuating anxiety levels with peaks and valleys; parents in the treatment group show more consistency in anxiety levels, and even a small decline in anxiety levels by the end of their participating in the study. Overall, children in both groups saw a decrease in anxiety over the course of their study enrollment. Researchers are also gauging the therapy dogs' temperament and behavior during the visits.

"This study will be a milestone in understanding of the benefits of the vital bond shared between people and animals," Dr. McCullough said. The findings are expected to further increase access to therapy animals in hospital environments, enhance therapy dog training and practice, and improve well-being outcomes for children and families facing the challenges of childhood cancer, she said.


Primary funding sources for the study include the global animal health company Zoetis and the Morris Animal Foundation through a partnership with the Human Animal Bond Research Initiative, with additional sponsors currently being sought.

The abstract, "The Effects of Animal-Assisted Interventions (AAIs) for Pediatric Oncology Patients, Their Parents, and Therapy Dogs at Five Hospital Sites," will be presented at 3:40 p.m. on Sunday, Oct. 25, in the Congress/Capitol Room of the Washington Marriott Marquis. To view the abstract, visit Please note: only the abstract is being presented at the meeting. In some cases, the researcher may have more data available to share with media, or may be preparing a longer article for submission to a journal. Contact the researcher for more information.

The American Academy of Pediatrics is an organization of 64,000 primary care pediatricians, pediatric medical subspecialists and pediatric surgical specialists dedicated to the health, safety and well-being of infants, children, adolescents and young adults. For more information, visit

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