Basic care, size, genetics and health affect how a horse ages. The growth and aging occurs much faster in a horse than it does in a human.
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Most horses live about 20 years, so I'd guess around 4 horse years to one human year.
Here is an article from EQUUS magazine August 2006 Comparatively Speaking: Although there's no simple equation for calculating how old your horse is in human years, it's possible to come up with a ballpark figure: *First horse year = 12 human years *Second horse year = 7 human years *Next three horse years = 4 years each *Subsequent horse years = 2 1/2 years each. This puts a 2-year-old colt in his late teens, a 5-year-old at full maturity and a 15-year-old at late middle age. What accounts for the difference in aging? Largely genetics and lifestyle. Horses mature much more quickly than their owners, so their formative years add up exponentially. Horses experience a few days of infancy, a few months of childhood and a year or more as teens. They are fully mature by 4 or 5 years of age, when they enter a lengthy active adulthood. Then they experience a short decline and brief terminal illness.
There are no horse years. You do not use horse years like you do dog years. A year is a year for the horse in years. So 3 years and 4 months would be just that. 3 years and 4 months.
30 horse years unlike dogs, horses dont have their own years a horse can be aged by its teeth. in saying that, a 30 year old horse is in its later stages of life. so really 30 years in humans is 'lower middle age' so in horse terms, a fourteen year old horse would be 'middle age'
Usually a "dog year" is 7 human years. A "cat year" changes from 14 human years for young cats to 4 human years for old cats.
A two year old wolf, in human years, is two years old.
Dogs age at 7 years compared to one human year... thus your 12 year old dog would be 84 years old in human years
A seven year old dog would be about 41 years old in "human years".
Chinchillas live about 15 years on average, so that would be about 6 years for every human year (considering a human life to be an average of 90 years)
Let's see . . . the fawn is two years old. In human years, that would be, um, two years old.
I'm kind of guessing here, but I'm sure that it's three. I say that, because, horses live to be about 25, and humans about 75. Divide 75 by 25, and what do you get?a vet told me it was 3 and a 1/2.