How pets age provides insight on them — and their humans, too
Acalculation launched in the 1950s says you can estimate your pup’s human age by multiplying his age by 7. With the common belief that humans lived to about 70 years of age and dogs to about 10 years of age, the 7:1 ratio was born. But that theory is not supported by science, and the math is not that simple.
New, more accurate guidelines are based on studies comparing breeds and genetic changes. According to studies at the University of California, a year-old dog is closer in age....