The ‘senior’ classification is based on the fact that Animals age faster than men and women, and veterinarians commence viewing much more age-related complications in these pets. Contrary to well known perception, puppies do not age in a amount of 7 human years for each year in Canine years.” A: https://kylergkxhr.blazingblog.com/33917914/detailed-notes-on-dog-years-to-human-years-formula