How the Dog Life Stage Calculator works
Methodology
A simple age-and-size classification used for planning. Veterinary life-stage frameworks vary and individual dogs age differently.
Frequently asked questions
Is “senior” a diagnosis?+
No. It is a life-stage label, not a statement that a dog is unhealthy.
Important veterinary note
Calculator outputs are estimates for education and planning. They do not diagnose disease, replace a physical examination, or override advice from a veterinarian who knows your dog.