A 5-year-old Labrador Retriever probably does behave like a 55-year old human. I think the important takeaway from this study is that every species/breed has a

A 5-year-old Labrador Retriever probably does behave like a 55-year old human. I think the important takeaway from this study is that every species/breed has a life-pattern that can be represented with a logarithmic graph and four key milestones. The fact that the first study used a specific dog breed is incidental.