Caring for a Senior Dog

When is a dog "senior"?

There's no single birthday that flips the switch, but a common rule of thumb is around age 7 — with a big caveat: size changes everything. A small dog may not be considered senior until 10 or 11, while a giant breed can start showing age by 5 or 6. Big dogs simply age faster.

That's why the calendar is less useful than watching your dog. The moment you start noticing the signs below — even if they're subtle — is a good time to shift into "senior mode" and talk with your vet about what that means for your particular dog.

Signs of aging

Some changes are cosmetic and harmless: a graying muzzle, a slower trot, more napping. Others deserve attention. Watch for stiffness when standing up, especially after rest; difficulty with stairs or jumping onto the couch; changes in appetite, thirst, or weight; and cloudiness in the eyes. A dog who was house-trained for years and suddenly starts having accidents isn't being difficult — that's a symptom worth investigating.

The theme here is that "just getting old" is often actually something specific and treatable. A dog who's slowing down because of arthritis can get real relief. A dog who's drinking more water may have a kidney issue your vet can manage. Don't write symptoms off as age until a vet has looked.

Diet & weight

Senior dogs usually need fewer calories, because they're less active and their metabolism slows. The trouble is that many owners keep feeding the same amount out of habit, and weight creeps on. That's a serious problem: around 60% of dogs are already overweight or obese,^[1] and extra pounds are brutal on aging joints and organs.

If your dog is carrying extra weight, shedding even a little can make stairs and walks noticeably easier. Ask your vet about a senior or weight-management formula and the right portion. On the flip side, unexplained weight loss in an older dog is also a red flag, not a win — it can point to dental pain, organ trouble, or other issues that need a look.^[2]

Mobility & pain

Arthritis is one of the most common issues in senior dogs, and dogs are stoic about it — they rarely limp until it's bad. Watch for the quiet signs: hesitating before a jump, lying down more, licking a joint, or a slight change in gait. If you spot them, say so at the vet visit, because pain management has come a long way and can genuinely change your dog's comfort.

At home, small changes help a lot. Non-slip rugs on hard floors, a ramp or step for the couch and bed, and shorter but more frequent walks are all cheap, effective upgrades. Keeping your dog moving — gently and regularly — is one of the best things you can do for stiff joints.

Twice-yearly vet checkups

Most vets recommend moving from once-a-year to twice-a-year exams once a dog is senior. Six months is a long time in an older dog's body, and a lot of age-related conditions progress quietly. Catching them early usually means cheaper, easier treatment. It's an investment: owners spend an average of about $598 a year on vet care for a dog,^[3] and senior years tend to run a bit higher than the average — but a preventive visit almost always costs less than an emergency.

At those checkups, your vet may want baseline bloodwork to track kidney and liver function over time. That baseline is valuable precisely because you'll have something to compare against next year, when the numbers mean more.

FAQ

Should I switch my senior dog to "senior" food?

Not automatically. Senior formulas are often lower in calories and may include joint support, which can help — but the right move depends on your dog's weight, activity, and health. Ask your vet whether a change is actually called for.

Is it normal for an old dog to sleep all day?

More sleep is normal, but a sudden jump in sleeping — or a dog who seems listless when awake — isn't. Pain, thyroid problems, and other conditions can look like laziness. When in doubt, mention it to your vet.

How can I tell if my senior dog is in pain?

Look for behavior changes more than crying or limping: stiffness after rest, reluctance to jump or climb, panting, restlessness, or withdrawing from touch. If you notice these, tell your vet — pain in dogs is treatable, but only if it's flagged.