Published in the Journal of the American Veterinary Medical Association, this review by C. Sexton and A. Ruple highlights a core challenge in veterinary epidemiology: the lack of consistent, comprehensive mortality data needed to accurately calculate dog life expectancy. Although scientific understanding of dogs has expanded across genetics, cognition, behavior, and physiology, lifespan estimates remain surprisingly inconsistent.
The authors reviewed 40 years of dog aging and mortality studies (1981–2023) to evaluate whether canine lifespan has changed over time. They found that incongruous and incomplete data made a formal meta-analysis impossible. Differences in study methodology, dog cohorts, and key covariates—such as breed, body weight, or health status—prevented meaningful comparisons across datasets.
However, the available evidence contradicts popular claims that dog lifespan is decreasing. Instead, the authors report that the median lifespan of domestic dogs has steadily increased across the decades examined. Still, the reliability of these numbers is limited by inconsistent data collection.
The review therefore calls for adopting a standardized, comprehensive method for reporting and recording dog mortality. Such a system would include uniform criteria for data collection, consistent reporting of demographic variables, and centralized databases accessible to researchers and veterinarians. These measures are essential to producing accurate and comparable lifespan estimates that can guide veterinary care, public understanding, and long-term studies of canine health and aging.
Source: Sexton, C., & Ruple, A. (2024). How can we achieve more accurate reporting of average dog lifespan? Journal of the American Veterinary Medical Association. Published June 12, 2024. Authors affiliated with veterinary epidemiology and canine health research programs.
