Senior dog care: a complete guide for your aging dog

One morning you notice your dog takes longer to get up, no longer jumps onto the couch in one go, or dozes off in the middle of the afternoon. Dogs age much faster than we do, and in just a few years they go from adults in their prime to needing a different kind of care. Senior dog care isn’t about accepting that “it’s just old age.” It’s about getting ahead of the changes, because many problems at this stage can be spotted early and eased.

In this guide you’ll learn when a dog is considered a senior, which checkups they need, how to recognize joint pain and cognitive decline, how to adjust their diet, and how to adapt your home.

When is a dog considered a senior?

There’s no single age. The American Animal Hospital Association (AAHA) defines a senior dog as one in the last 25% of their expected lifespan, and life expectancy depends heavily on size: small dogs live considerably longer than large and giant breeds.

These are rough guidelines: genetics, weight, and overall health can speed up or slow down aging, and mixed breeds generally follow the pattern for their size. If you’re curious how your dog’s age translates, see our guide to dog years to human years.

Vet checkups: every 6 months

Once your dog reaches this stage, AAHA and most veterinarians recommend moving from yearly exams to checkups every 6 months. For a senior dog, six months is the equivalent of several human years, and conditions that are common at this age, such as kidney disease, hypothyroidism, diabetes, heart disease, and some cancers, can progress silently for months before causing obvious symptoms.

Not every test is done at every visit; your vet will choose based on your dog’s history.

Joint pain and arthritis: how to spot it and help

Osteoarthritis is one of the most common conditions in older dogs and one of the most underdiagnosed, because dogs are very good at hiding chronic pain. They rarely whimper; they simply do less. Watch for these signs:

• Stiffness when getting up, especially after sleeping or a long walk, that eases after a few minutes.
• Hesitating before stairs, jumping onto the couch, or getting into the car.
• Lagging behind on walks or wanting to turn back early.
• Sitting crooked or struggling to squat to poop.
• Licking a joint, growling when you touch their hips, or acting more irritable.
• Losing muscle in the thighs and hindquarters.

If several of these sound familiar, read our guide to the signs your dog is in pain. In large breeds, arthritis is often the result of hip dysplasia or elbow dysplasia present since youth.

What helps most:

1. Keep them lean. Every extra pound loads the joints. In a lifetime study of Labrador Retrievers (Kealy et al., 2002), dogs fed 25% less food lived a median of nearly two years longer and developed arthritis later. If your dog is carrying extra weight, start with our guide to overweight dogs.
2. Moderate, regular exercise. Two or three easy 15- to 30-minute walks a day beat one long weekend hike. Swimming and hydrotherapy are joint-friendly; avoid jumping and games with sudden stops and sharp turns.
3. Pain management prescribed by your vet: dog-specific anti-inflammatories, monthly monoclonal antibody injections, physical therapy, and rehabilitation. Never give human pain relievers: ibuprofen, naproxen, and acetaminophen can be very toxic to dogs.
4. Supplements with a purpose. Marine omega-3 fatty acids (EPA and DHA) have some evidence for canine arthritis; the evidence for glucosamine and chondroitin is weaker. Ask your vet before adding anything.
5. Short nails. Less walking means less natural wear, and long nails change how your dog bears weight and make them slip. See how to trim dog nails.

Cognitive decline: canine “dementia”

Canine cognitive dysfunction is brain aging that shares many features with Alzheimer’s disease in people, and it’s more common than most owners realize. In a classic study (Neilson et al., 2001), nearly 30% of dogs aged 11–12 and close to 70% of dogs aged 15–16 showed at least one sign. Many owners chalk it up to old age and never mention it to their vet.

The signs fall into six areas:

• Disorientation: staring at walls, getting stuck behind furniture, or waiting at the hinge side of the door.
• Social changes: seeking less contact or, the opposite, becoming clingier.
• Sleep: sleeping more during the day and pacing, wandering, or barking at night.
• House soiling in a dog who was always reliably house-trained.
• Activity: playing less, or aimless circling and licking.
• Anxiety: more fear of noises, of being alone, or of new places.

Before diagnosing cognitive dysfunction, your vet should rule out conditions that cause similar changes, such as pain, vision or hearing loss, high blood pressure, or kidney disease. If it’s confirmed, there’s no cure, but you can slow it down and ease it with:

• A predictable routine: set times for meals, walks, and rest.
• Daily, age-appropriate enrichment: sniffing games, puzzle feeders, simple tricks, and calm walks in new places. Find ideas in our guide to mental stimulation for dogs.
• Diets and supplements with antioxidants, omega-3s, or medium-chain triglycerides, plus medications your vet can prescribe.
• A dim night-light and a last potty trip right before bed.

What to feed a senior dog

There’s no one-size-fits-all senior diet, because older dogs vary enormously. Two profiles are common:

• The senior who gains weight: moves less and puts on pounds eating the usual amount. Needs fewer calories.
• The senior who loses weight: especially in advanced age, loses muscle and weight and eats or digests less well. Needs a tasty, highly digestible diet with enough high-quality protein.

Guidelines that work for almost every older dog:

• Weigh them monthly and check body condition: you should be able to feel the ribs easily without seeing them.
• Don’t cut protein without a reason. A healthy senior needs protein to maintain muscle; low-protein, low-phosphorus diets are only for dogs with kidney disease and should be prescribed by your vet.
• Switch foods only for a reason, and gradually over 7–10 days. The best senior food is the one that keeps your dog at a healthy weight with good muscle.
• If chewing is hard, soften kibble with warm water or mix in canned food, and ask for a dental exam: mouth pain is a common reason older dogs eat less.
• Split meals into 2–3 smaller portions if digestion is an issue, and keep treats under 10% of daily calories.

How to make your home senior-friendly

• Non-slip floors: rubber-backed rugs or yoga mats in hallways, next to their bed, and where they eat. Hardwood and polished tile are an ice rink for weak legs.
• Ramps or pet stairs for the couch, bed, or car, and a baby gate at the top of the stairs if they’re unsteady.
• An orthopedic bed made of memory foam, with low sides and away from drafts; older dogs regulate their body temperature less well.
• Food and water bowls at a comfortable height if bending down is hard. For large and giant breeds at risk of bloat, check with your vet first.
• More potty breaks, including one right before bed; many seniors can’t hold it as long as they used to.
• If vision or hearing is fading, keep furniture where it is, use a floor vibration or stomp to alert them before you touch them, and teach hand signals. The bluish haze many older dogs develop in their eyes is usually nuclear sclerosis, a normal aging change; cataracts look white and opaque and do affect vision.
• Weekly brushing as a health check: use it to feel for new lumps and check the skin, ears, and mouth.

Warning signs in a senior dog

Not everything is “just old age.” Many changes blamed on the years are treatable illnesses.

Quality of life in the final stage

At some point, the question shifts from how long your dog will live to how well they’re living. Tools like the quality-of-life scale created by veterinarian Alice Villalobos, which scores pain, appetite, hydration, hygiene, happiness, mobility, and whether there are more good days than bad, help you assess this objectively if you fill them out weekly. Talking with your vet about hospice care and, when the time comes, euthanasia isn’t giving up; it’s caring for your dog all the way to the end.

Frequently asked questions

How much exercise does a senior dog need?

It depends more on health and breed than on age alone. Most older dogs do best with two or three daily walks of 15–30 minutes at an easy pace with plenty of time to sniff, rather than one long outing. Exercise maintains muscle, joints, and mental sharpness. If your dog is stiff or limping the day after a walk, it was too much: shorten it and spread it over more outings.

Is it normal for an older dog to sleep a lot?

Yes. Senior dogs sleep more hours, and their sleep is lighter. What isn’t normal is sleeping all day and being restless or confused at night, being very hard to wake, or sleeping more along with poor appetite, weakness, or a general loss of interest. Those changes can point to pain, cognitive dysfunction, hypothyroidism, or other medical problems worth checking.

Is anesthesia safe for an older dog?

Age itself isn’t a disease, and many senior dogs need anesthesia for a dental cleaning or lump removal. The risk depends mainly on overall health, which is why your vet will run blood work and sometimes other tests beforehand, then tailor the anesthesia and monitoring. Putting off a needed dental cleaning out of fear usually causes more problems than it prevents.

Should I switch to senior dog food at age 7?

Not necessarily. There’s no official nutrient profile for senior dogs, and foods labeled “senior” vary widely in calories, protein, and phosphorus. If your dog is at a healthy weight, has good muscle, and has normal lab work, they can stay on their current food. Switch when there’s a reason, such as weight gain or loss, kidney disease, or dental problems, and ask your vet for advice.

Why has my senior dog started peeing in the house?

The most common causes are medical: urinary incontinence (common in older spayed females, who may leak urine while sleeping), urinary tract infections, conditions that increase thirst such as kidney disease, diabetes, or Cushing’s disease, and cognitive dysfunction. Arthritis pain can also make it hard to get outside in time. Don’t scold your dog; take them to the vet with a fresh urine sample.

Sources

• American Animal Hospital Association (AAHA): 2023 Senior Care Guidelines for Dogs and Cats.
• World Small Animal Veterinary Association (WSAVA): Global Nutrition Guidelines.
• Merck Veterinary Manual: osteoarthritis and cognitive dysfunction syndrome in dogs.
• Kealy, R. D., et al. (2002). Effects of diet restriction on life span and age-related changes in dogs. Journal of the American Veterinary Medical Association.
• Neilson, J. C., et al. (2001). Prevalence of behavioral changes associated with age-related cognitive impairment in dogs. Journal of the American Veterinary Medical Association.