What the signs actually look like.

The most common signs of pain in a senior dog include changes in posture, reluctance to move, altered breathing patterns, appetite changes, and behavioral shifts like increased irritability or withdrawal. Most are subtle enough that pet parents attribute them to "just getting older" — but aging itself doesn't cause pain. An underlying condition like arthritis, hip dysplasia, or spinal disease usually does.

Osteoarthritis affects at least 80% of dogs over the age of eight, according to VCA’s veterinarians — yet many go undiagnosed, because the signs read as “just aging.” The gap between actual pain and detected pain in senior dogs is enormous, and closing it starts with knowing what to look for.

Five signs you can see in motion.

1. Slower to get up

One of the earliest and most overlooked signs is hesitation when rising. If your dog used to spring up at the sound of a leash jingling but now takes a few extra seconds — or a couple of attempts — that's not laziness. That's start-up stiffness, a hallmark of osteoarthritis: joints lose lubrication overnight, and the first movements of the day are the most painful. Improvement after a few minutes of walking can make it seem minor. It isn't.

2. Avoiding stairs or jumping

A dog that once bounded up the stairs or leaped onto the bed but now hesitates, detours, or waits to be lifted is almost certainly experiencing joint pain. This is one of the clearest signs because it's a conscious decision to avoid an activity that hurts. A dog who skips the stairs on cold mornings or after long walks is showing a pain pattern tied directly to inflammation levels — and reluctance to climb stairs is among the top indicators veterinarians use when screening for arthritis.

3. A changed posture

A dog with back pain may develop a slightly arched or hunched spine. Hip pain shifts weight to the front legs, creating a "leaning forward" stance; neck pain lowers the head carriage. Stand behind your dog and watch them walk away: swaying hips, one leg stepping shorter. Veterinary orthopedic specialists call this compensatory gait — the body loading healthier joints more heavily, which can eventually cause secondary problems in those joints too.

4. Trembling while standing

Muscle trembling in a standing position — most visible in the hind legs — means the muscles are working overtime to compensate for painful or unstable joints. It's not cold-shivering: it appears under weight-bearing and resolves lying down. In senior dogs it often signals advancing arthritis, degenerative joint disease, or early degenerative myelopathy, showing up most after walks, during prolonged standing, or on slippery floors.

5. Lagging behind on walks

The dog that once pulled you down the street but now walks at your pace — or behind you — is telling you something. Reduced exercise tolerance is progressive, worsening over weeks and months: sitting down mid-walk, choosing shorter routes, reluctance at the door. Healthy senior dogs should still enjoy moderate activity; when enthusiasm drops, the activity is hurting enough that your dog is consciously limiting effort.

Five signs that hide in the routine.

6. Panting at rest

Panting at rest — especially at night or in cool rooms — is a well-documented pain response. Stress hormones like cortisol raise respiratory rate without any exertion, the canine version of how humans breathe faster in acute discomfort. It often arrives alongside restlessness, difficulty settling, or frequent position changes — together, a picture of chronic discomfort your veterinarian will want to investigate.

7. Irritability or withdrawal

A friendly dog that starts growling when touched in certain areas, snapping at housemates, or pulling away from petting isn't developing a "bad attitude" — pain changes behavior. Equally telling is the dog that retreats: less attention-seeking, more time alone, lost interest in favorite activities. A 2019 study in Applied Animal Behaviour Science found dogs with chronic pain showed significantly reduced social interaction with both humans and other dogs, even when other signs were minimal.

8. Appetite changes

Some dogs eat less because bending to a floor-level bowl hurts — common with neck, spine, or shoulder pain. Others eat more slowly, take smaller bites, or leave and return to the bowl mid-meal. Try raising the bowls to shoulder height; if appetite improves, the old posture was painful. Any significant appetite change still warrants a vet visit to rule out dental disease or organ issues.

9. Licking one spot repeatedly

Obsessive licking or chewing over a joint — wrist, knee, hip, elbow — is a self-soothing response to localized pain, sometimes leaving hair loss or "lick granulomas." Tricky detail: referred pain means the licking spot doesn't always match the source; a dog with hip pain might lick the lower leg on the same side. A persistent limb-licking habit may reveal an orthopedic issue, not a skin problem.

10. Changed sleep patterns

Circling repeatedly before lying down, failing to get comfortable, waking at night, or sleeping in odd positions can all mean painful joints are dictating posture. The reverse matters too: sleeping far more than usual can be a coping mechanism — the canine equivalent of checking out when the body doesn't feel good. A noticeable shift in either direction belongs in your vet conversation.

What to do today.

If your senior dog is showing even two or three of these signs, a veterinary pain assessment is the essential first step: a physical exam, orthopedic evaluation, and potentially X-rays to identify the source and build a management plan. Beyond the vet visit, four home fronts make a real difference.