The concept of One Health is the unity of multiple practices that work together locally, nationally, and globally to help achieve optimal health for people, animals, and the environment. When the people, animals, and environment are put together they make up the One Health Triad . The One Health Triad shows how the health of people, animals, and the environment are linked to one another. With One Health being a worldwide concept, it makes it easier to advance health care in the 21st century. When this concept is used, and implied properly it can help protect and save the lives of both people, animals, and the environment in the present and future generations. Background The origins of the One Health Model dates as far back as 1821, with the first links between human and animal diseases being recognized by Rudolf Virchow. Virchow noticed links between human and animal disease, coining the term "zoonosis." The major connection Virchow made was between Trichinella spiralis in swine and human infections. It was over a century later before the ideas laid out by Virchow were integrated into a single health model connecting human health with animal health. In 1964, Dr. Calvin Schwabe, a former member of World Health Organization (WHO) and the founding chair of Department of Epidemiology and Preventive Medicine at the Veterinary School at the University of California Davis, called for a "One Medicine" model emphasizing the need for collaboration between human and wildlife pathologists as a means of controlling and even preventing disease spread. It would be another four decades before the One Health became a reality with the 12 Manhattan Principles, where human and animal pathologists called for "One Health, One World." The One Health Model has gained momentum in recent years due to the discovery of the multiple interconnections that exist between animal and human disease. Recent estimates place zoonotic diseases as the source 60% of total human pathogens, and 75% of emerging human pathogens. Applying the One Health Model The One Health Model can constantly be applied with human and animal interactions. One of the main situations where One Health can be applied is with canine and feline obesity being linked to their owners and their own obesity. Obesity in canines and felines is not good for them nor is it good for humans. The obesity of humans and their animals can result in many health problems such