Margret Casal of the School of Veterinary Medicine offered advice for promoting longevity in dogs and commented on a new equation to measure how dogs age. “It will be interesting to look at different breeds," she said. "We know that some smaller breeds live longer and some larger ones don’t live quite as long.”
https://www.nbcnews.com/health/health-news/how-old-your-dog-new-equation-shows-how-calculate-its-n1233459 NBC News