When is a dog considered old? Key signs of aging
Published on 2026-04-14
Dogs enter their senior years earlier than many owners realize — often between 7 and 10, depending on size. Here are the clearest signs of aging and what to do about them.
At what age is a dog a senior?
There is no single answer — size matters. Small dogs under 10 kg are typically considered senior from about age 11, medium dogs from 10, large dogs from 8, and giant breeds from just 6 or 7. Veterinarians commonly use these thresholds to recommend more frequent health checks, blood work, and dietary changes.
Seven signs your dog is aging
Look for: slower movement and stiffness (arthritis), cloudier eyes (lenticular sclerosis), grey muzzle, weight gain or loss, less enthusiasm for play, occasional confusion or restlessness at night, and reduced hearing. Any one of these alone is not alarming, but several together suggest your dog has entered a senior phase.
How to support an aging dog
Switch to a senior diet with joint support (glucosamine, omega-3), add twice-yearly vet visits with blood work, keep walks shorter but more frequent, use non-slip rugs on hard floors, and consider a ramp for the car or sofa. Mental stimulation through scent games slows cognitive decline.