Home / Senior Dogs
A dog counts as senior for roughly the last quarter of life, and the age that stage starts depends mostly on size. A giant breed can be a senior at 5 to 6 years old, while a toy breed may not get there until about 10. That gap is why senior care is not about one birthday. It is about noticing the stage your own dog has reached, then adjusting the rhythm of vet care, food, exercise and home life to match it.
| Size class | Typical lifespan pattern | Senior from |
|---|---|---|
| Giant | Giant breeds tend to live the shortest lives of any size class. | From about 5 to 6 years |
| Large | Large breeds tend to live shorter lives than smaller dogs. | From about 7 years |
| Medium | Medium breeds sit in the middle for lifespan. | From about 8 years |
| Small | Small breeds tend to live long lives, close to toy breeds. | From about 10 years |
| Toy | Toy breeds tend to live the longest lives of any size class. | From about 10 years |
Thresholds are the same senior ages used in the growth table on every breed profile on this site, so the senior row there tells you when this section starts to apply to your breed.
Vet rhythm. Most vets suggest twice yearly checkups for senior dogs, with bloodwork as part of senior screening. Six months is a long time at this life stage, and early changes are the easiest to help. See senior dog vet checks.
Weight. Extra weight loads aging joints and organs. Weigh your dog regularly, keep seniors lean, and mention any steady trend, up or down, at the next visit. See mobility and joints.
Teeth. Dental disease builds quietly for years and hurts quietly too. Home brushing, honest checks and timely dental work protect appetite and comfort. See senior dog dental care.
Joints. Stiffness after rest, slower stairs and shorter walks are common. Steady gentle exercise, a lean weight and a home set up for steady feet help more than rest alone. See mobility and joints.
Mind. Some old dogs sleep differently, stare, or seem less sure of familiar rooms. Medical causes can look the same, so a vet check comes first, then daily brain care. See senior dog minds.
Senses. Eyes cloud, hearing fades and smell stays strong longest. Keep routines steady, approach a sleeping old dog gently, and let scent rich walks do the entertaining. Any sudden change in eyes or behaviour is a reason to book a vet.
The twice yearly rhythm: what a typical senior check covers, what bloodwork screens for, and what to track at home.
Weight, steady exercise and a home set up with ramps, rugs and good light, so old legs stay confident.
Why teeth matter more with age, a brushing routine that sticks, and an honest answer on anaesthesia.
Night restlessness, staring and confusion: the vet first rule, daily brain care and patience.
The first 72 hours checklist, from the quiet corner you set up before arrival to the first month rhythm.
Our senior age calculator shows when your dog counts as senior for their size, and the care rhythm that changes.
Every breed profile shows the senior row in its growth table, so you can check the threshold for your exact breed in the breeds section and build a calm plan from the guides above.
For roughly the last quarter of life, and the age that starts depends on size. Giant breeds count as senior from about 5 to 6 years, large breeds from about 7, medium breeds from about 8, and small and toy breeds from about 10.
Most vets move senior dogs to twice yearly checkups, because six months is a long time at that life stage and small changes are easier to help when they are caught early. A typical senior check includes weight, teeth, joints, heart and lungs, eyes and lumps, plus bloodwork as part of senior screening.
Yes. Gentler, shorter and more frequent exercise protects joints, weight and mind, and old dogs still enjoy learning. Keep sessions easy, let the dog set the pace, and swap long weekend walks for steady daily ones.
Last updated: November 2026. This page is general information only, not veterinary advice for a specific dog. Our sources and verification method are on our methodology page.