The “multiply by seven” rule has no scientific basis. It appears to come from mid-century pet-care marketing, and it is still what most calculators use.
This one shows you the current epigenetic research alongside a size-adjusted estimate — and explains why they disagree.
Start the log while you have a baseline
Knowing your dog’s life stage is useful once. Knowing how they change across it is useful for years.
We’ll send you our printable Canine Health Tracker — a twelve-month log of five simple observations, plus what to bring to a veterinary appointment. Free, and the most useful thing you can hand a vet who otherwise only has a snapshot.
