Forget the 7‑Year Rule: Why Small Dogs Age Slower Than Big Dogs
For decades, dog owners have repeated the familiar saying that one human year equals seven dog years. It’s catchy, simple, and easy to remember — but it’s also scientifically inaccurate. Dogs do not age in a linear, predictable way, and the rate at which they age varies dramatically by breed size. In fact, one of the most fascinating discoveries in canine science is that small dogs age slower than big dogs, both externally and at the molecular level. This article explores the
