the library

Guides for dog people

Everything we know about how dogs age — what the science says, what actually matters, and how to give the years together their full measure.

The Definitive Dog Years to Human Years Chart

Complete reference chart by breed size. The 7:1 rule debunked, with the real numbers.

DNA methylation, epigenetic clocks, and why small dogs outlive big dogs. Accessible science.

When your dog becomes a senior, and the small adjustments that make the biggest difference.