Note: It is a common belief that 1 human year is equal to 7 dog years. That is
not very accurate, since dogs reach adulthood within the first couple of years.
The formula used above is from a canine expert and is a bit more accurate.
(as accurate as one can judge these things)
The formula is: 10.5 dog years per human year for the first 2 years, then
4 dog years per human year for each year after.
