No sure what their formula exactly is.
http://www.npwm.com/mc_pet_age_calculator.asp?menu_id=405&menu_item_id=1
Pretty intersting though, don't you think?
Usually related ages is based on weight, lower the weight, younger in years… so looking at this, it is based that way also... if you leave the same age, change the weight the age changes
I do not know but I had a old time vet tell me that there is really no set rule because no two dogs age the same. He said no two people get gray hair or wrinkles at same age as we all age whenever we do. He did however say that almost all large dogs age faster. Not sure who is right or wrong or if anyone really is.
Rita Jean
The rule of thumb is usually the bigger the dog, the short the life span
Great Danes I think have the shortest lives.
Or Irish Wolfhounds
or bullmastiffs..
