Lol just someone trying to feel relevant and get reactions. That would mean a dog ages to more than middle age at just 2 years of age? That's just stupid LoL. It still have to live 8 years to go from 40 years to 70? That is just insulting people's intelligence.
One seen this chat before. I've heard the 1st year being 15 for awhile now. At one the dog is about full grown but mentally immature, much like a Golden or lab. We all know they take 2-3 years to mentally mature. So this chart, I've agreed with for quite awhile now.