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How old is your dog in human years? New method better than 'multiply by 7'


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How old is your tail-wagging bundle of joy in human years? According to the well-known ''rule of paw,'' one dog year is the equivalent of 7 years. Now scientists say it's wrong. Dogs are much older than we think, and researchers devised a more accurate formula to calculate a dog's age based on the chemical changes in the DNA as organisms grow old.UpW38Ctm1Xw

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Frustratingly the linked article doesn't seem to actually *provide* the new formula. I recently read an article in the newspaper that may have been referencing this new formula, which was the natural log of the dog's age in years multiplied by 16, plus 31.

(ln[age in years]*16)+31

Example, using Dundee, 10, this comes out to be 67.8. Harsh, but probably fair.

You will note that the scale basically starts at 31. This reflects that unlike a 7 year old human, a dog even less than one can whelp. So the age curve is very steep at first; as the dog gets older the effect of the formula year-on-year is less.

This particular formula does not seem to factor in size.

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