An obesity epidemic is currently sweeping America as adult obesity rises from 11% of the population in 1990 to 40% in 2018. It has been claimed that pet ownership, particularly dog ownership might lower obesity rates. But a Japanese review of 25 research reports on the topic, covering over 200,000 subjects, found that there was no noticeable impact of pet ownership on obesity rates.
Herzog, Harold. Can pets really help fight America's obesity epidemic?. (2020) 'Animals and Us' Blog Posts, Psychology Today, 21 May, 115. https://www.psychologytoday.com/us/blog/animals-and-us/202005/can-pets-really-help-fight-americas-obesity-epidemic