Dog · Guide

When is a dog considered a senior?

Senior age scales with size. A small dog (under 25 lb) is a senior at around 11 years. A medium dog at around 10 years. A large dog at around 8 years. A giant breed as early as 6 years. The blanket "7 years old" figure is too early for small dogs and too late for giants.

Why giant breeds age so much sooner

Larger dogs age faster across every system — joints, heart, and cognition. A Great Dane at 6 is physiologically closer to a Chihuahua at 11. It's one of the sharpest differences in the whole species and it's routinely missed.

This matters because senior care isn't cosmetic. It means twice-yearly vet exams instead of annual, earlier bloodwork, and watching for joint stiffness, weight change and dental disease before they become advanced.

What changes in senior care

Wellness exams move from yearly to twice yearly. Weight becomes more important in both directions — gaining strains joints, while unexplained loss can be the first sign of something serious.

Many seniors benefit from joint support and omega-3s, but supplements should follow evidence rather than age alone. A healthy senior on a complete diet often needs nothing extra.

What's normal ageing and what isn't

Slowing down, sleeping more and greying around the muzzle are normal. Sudden weight loss, increased thirst, laboured breathing, or a change in toileting habits are not — those warrant a vet visit rather than being written off as "getting old."

Check your own pet — freeSnap a few photos, get a wellness score in minutes

A wellness check, not a diagnosis — and never a replacement for your vet. If something seems wrong with your animal, see a veterinarian.

Common questions

Is 7 years old a senior dog?

For a large or giant breed, yes. For a small breed, no — small dogs generally aren't seniors until around 11.

How often should a senior dog see a vet?

Twice a year rather than annually. Earlier detection is the main advantage of senior care.

Do senior dogs need different food?

Many benefit from a senior formula with adjusted calories and joint support, but the more important factor is maintaining a healthy body condition.