Signs Your Dog Is in Pain: 12 Critical Warning Signs Every Owner Must Know

It is 7pm on a Tuesday. Your dog has been quieter than usual all day. They skipped their evening walk enthusiasm, ate half their food, and are lying in the corner instead of on the sofa next to you. Something feels off but you cannot put your finger on it. That feeling is worth paying attention to. Knowing the signs your dog is in pain is one of the most important skills any dog owner can develop, because dogs are hardwired to hide discomfort and by the time the signs are obvious, the problem has often been building for a while.

signs your dog is in pain

Why Dogs Hide Pain: The Survival Instinct Working Against You

Before diving into the signs, it helps to understand why dogs conceal pain so effectively. In the wild, showing weakness invites predation. Dogs evolved as both predators and prey, and that evolutionary pressure created animals that suppress visible signs of suffering as a survival mechanism.

Dr. Patricia McConnell, animal behaviourist and author of The Other End of the Leash, notes that dogs communicate discomfort primarily through subtle postural and behavioural shifts that most owners are not trained to read. By the time a dog is vocalising pain openly, the discomfort is usually severe.

The American Veterinary Medical Association recognises pain management as a core welfare concern precisely because of how effectively animals mask it. Recognising the early signs is the difference between catching a problem at stage one versus stage four.

Quick Reference: Signs Your Dog Is in Pain

Use this table as a first assessment guide. Read the full section for each sign before drawing conclusions.

Sign Urgency What To Do
Decreased appetite Low to Medium Monitor for 24 hours, vet if persists
Unusual quietness or withdrawal Low to Medium Monitor, vet if combined with other signs
Reluctance to move or exercise Medium Vet visit within 24 to 48 hours
Limping or favouring a limb Medium Vet visit, do not exercise until assessed
Postural changes Medium Vet visit within 24 hours
Excessive grooming of one area Medium Vet visit to rule out injury or infection
Changes in breathing Medium to High Vet visit same day
Aggression or snapping when touched Medium to High Vet visit, handle with care
Trembling or shaking Medium to High Vet visit, rule out toxin exposure
Vocalising when touched or moving High Vet visit same day
Inability to get comfortable High Vet visit same day
Collapse or inability to stand Emergency Emergency vet immediately

The 12 Most Important Signs Your Dog Is in Pain

1. Decreased Appetite or Refusing Food

A dog that suddenly loses interest in food is telling you something. Pain, especially abdominal pain, dental pain, or musculoskeletal pain, suppresses appetite in dogs just as it does in humans. According to the American Kennel Club, a dog refusing meals for more than 24 hours warrants veterinary attention, particularly when combined with other behavioural changes.

One missed meal in an otherwise healthy dog is not necessarily alarming. Two or more missed meals, especially alongside any other sign on this list, is a clear signal to call your vet.

2. Unusual Quietness or Social Withdrawal

Dogs in pain often withdraw. They seek out corners, under beds, or spots they do not normally occupy. They may stop greeting you at the door, lose interest in play, or simply seem flat and disengaged. This behavioural shift is one of the earliest and most consistent indicators of pain across species.

Dr. Frank McMillan, veterinary internist and author of Mental Health and Well-Being in Animals, describes social withdrawal as the dog’s attempt to conserve energy and avoid interactions that might aggravate the pain. It is not stubbornness or moodiness. It is a coping response.

3. Reluctance to Move, Jump, or Exercise

A dog that suddenly refuses to jump onto the sofa, hesitates on stairs, or lags behind on walks they previously enjoyed is likely experiencing pain that makes movement uncomfortable. This is particularly common in dogs with arthritis, intervertebral disc disease, or soft tissue injuries.

The Cornell University College of Veterinary Medicine notes that reluctance to exercise is one of the primary presenting signs of chronic pain in middle aged and senior dogs, and is frequently misread by owners as the dog simply getting older rather than as a treatable condition.

4. Limping or Favouring a Limb

Limping is one of the more obvious signs your dog is in pain, but its cause is not always obvious. It can indicate anything from a thorn in the paw to a torn ligament to bone cancer. The location, onset, and severity of the limp all matter.

Sudden onset limping after exercise often indicates soft tissue injury. Gradual onset limping that worsens over weeks or months more commonly indicates a progressive condition like arthritis or hip dysplasia. Any limp that persists beyond 24 hours, causes the dog to avoid bearing weight entirely, or is accompanied by swelling or heat warrants a vet visit.

5. Postural Changes

Pain changes how a dog holds their body. Common postural signs include:

The World Small Animal Veterinary Association pain assessment guidelines specifically include postural changes as a primary indicator in clinical pain scoring for dogs.

6. Excessive Grooming or Attention to One Area

Dogs instinctively lick, chew, or paw at areas that hurt. If your dog is obsessively grooming a specific spot on their body with no obvious skin issue visible, the behaviour may be masking an underlying pain source. This is especially common with joint pain, where dogs will lick the overlying skin repeatedly even when the problem is deeper in the tissue.

According to research published in the Journal of Veterinary Behavior, repetitive self directed grooming in the absence of skin pathology is a recognised pain behaviour that is frequently overlooked in clinical settings.

7. Changes in Breathing

Shallow, rapid, or laboured breathing outside of exercise or heat can indicate pain. Dogs in significant pain will often pant even in cool environments, not because they are hot but because pain activates the sympathetic nervous system and increases respiratory rate.

Breathing changes combined with pale gums, reluctance to move, or abdominal distension are a potential emergency. Bloat (gastric dilatation volvulus) in particular presents with distress, laboured breathing, and an inability to get comfortable and is life threatening without immediate intervention.

8. Aggression or Snapping When Touched

A dog that has never shown aggression suddenly growling, snapping, or biting when touched in a specific area is almost certainly in pain. This is one of the most misunderstood signs your dog is in pain because owners often attribute it to behavioural problems rather than physical ones.

Dr. Ian Dunbar, veterinary behaviourist and founder of the Association of Pet Dog Trainers, consistently emphasises that sudden onset aggression in a previously non-aggressive dog should always trigger a veterinary examination before any behavioural intervention is attempted. Pain is the most common underlying cause.

9. Trembling or Shaking

Trembling without an obvious environmental cause such as cold or fear is a recognised pain response in dogs. It reflects the body’s physiological stress response to discomfort. If your dog is shaking and you have ruled out temperature and anxiety, pain should be high on your list of considerations.

For a full breakdown of why dogs shake and tremble and how to tell the difference between benign and serious causes, see our guide on why does my dog shake and tremble.

10. Vocalising When Touched or Moving

Whimpering, yelping, or groaning when touched, picked up, or during movement is an unambiguous pain signal. By the time a dog is vocalising pain, the discomfort is typically significant. Do not wait to see if it passes. Same day veterinary attention is appropriate.

11. Inability to Get Comfortable

A dog that repeatedly lies down, gets up, circles, lies down again, and cannot seem to settle is often in pain. This restlessness reflects the body’s attempt to find a position that reduces discomfort. It is particularly associated with abdominal pain, bloat, back pain, and joint pain.

When this behaviour appears suddenly and is accompanied by any other sign on this list, treat it as urgent. Bloat in particular can progress from restlessness to life threatening crisis within hours.

12. Changes in Eyes and Facial Expression

Research from the University of Lincoln published in Pain journal identified a canine pain scale based on facial expressions, called the Dog Grimace Scale. Key indicators include:

These subtle facial cues are often the earliest visible sign of pain, appearing before behavioural changes become obvious. Learning to read your dog’s face is one of the most valuable skills you can develop as an owner.

Signs Your Dog Is in Pain: Chronic vs Acute

Understanding whether pain is acute (sudden onset) or chronic (ongoing) changes how you respond.

Acute pain comes on suddenly, is usually linked to an injury or illness, and the dog often shows clear distress signals. Examples include a broken bone, an insect sting, or a sudden gastrointestinal crisis. Acute pain usually requires same day or emergency veterinary attention.

Chronic pain develops gradually and dogs adapt to it over time, making it far harder to detect. Arthritis is the most common source of chronic pain in dogs. The signs are subtle: slightly less enthusiasm for walks, a preference for softer surfaces, taking longer to stand up in the morning. Many owners attribute these to ageing when they are actually treatable pain symptoms.

The International Association for the Study of Pain recognises that chronic pain in animals is systematically undertreated because of how effectively animals mask it and how gradually the behavioural changes accumulate.

What Not to Do If You Think Your Dog Is in Pain

Three common mistakes that can make things significantly worse:

When Signs Your Dog Is in Pain Become an Emergency

Go to an emergency vet immediately if:

When in doubt, call your vet. A five minute phone call is always better than waiting and regretting it.

How to Describe Pain Signs to Your Vet

The more precisely you describe what you observed, the faster your vet can diagnose. Note the following before your appointment or call:

Video of the behaviour at home is extremely useful, particularly for intermittent signs that may not be visible during the appointment.

Quick Answers: Signs Your Dog Is in Pain

Can a dog be in pain without limping?
Absolutely. Limping is just one of many pain signs and is usually associated with limb or joint pain. Dogs with abdominal pain, dental pain, back pain, or generalised illness will often show no limping at all. Behavioural and postural changes are far more reliable overall indicators.
How do I know if my dog is in pain or just tired?
Tiredness after exercise is normal and resolves quickly with rest. Pain related withdrawal persists regardless of rest, tends to worsen over time, and is usually accompanied by at least one other sign such as appetite changes, postural shifts, or reluctance to be touched in certain areas.
Do dogs cry when they are in pain?
Some do, but most do not, especially with chronic pain. Vocalisation is more common with sudden acute pain such as an injury. Many dogs in significant chronic pain show no vocalisation at all, which is why the subtler behavioural signs on this list are so important to know.
Can I give my dog paracetamol or ibuprofen for pain?
No. Both are toxic to dogs. Paracetamol causes liver damage and ibuprofen can cause kidney failure and gastrointestinal bleeding even in small doses. Never give your dog human pain medication without explicit instruction from your vet. There are safe veterinary pain relief options your vet can prescribe.
Why is my dog eating grass? Could it be pain?
Grass eating is sometimes associated with nausea or abdominal discomfort but is not a reliable pain indicator on its own. Most dogs eat grass occasionally with no underlying issue. If grass eating is combined with vomiting, appetite loss, or a hunched posture, abdominal pain or gastrointestinal upset is worth investigating.
My dog seems fine at the vet but acts painful at home. Why?
This is extremely common. The adrenaline response to the unfamiliar vet environment temporarily masks pain signals. Dogs with chronic conditions often appear more mobile and alert at the clinic than at home. This is why video documentation of behaviour at home is so valuable for accurate diagnosis.
What pain relief can I give my dog at home while waiting for a vet appointment?
The safest thing you can do while waiting is restrict activity, keep the dog comfortable and calm, and avoid touching or manipulating the area that seems painful. Do not give any medication, human or otherwise, without veterinary guidance. If the pain appears severe, seek same day or emergency veterinary care rather than waiting.
How do vets assess pain in dogs?
Vets use a combination of physical examination, pain scoring scales such as the Glasgow Composite Pain Scale, observation of movement and posture, and owner reported history. Advanced diagnostics like X-rays, ultrasound, or blood panels are used to identify the underlying cause. Owner observations before the appointment are an important part of the assessment.

The Bottom Line

The most important thing to understand about the signs your dog is in pain is that by the time they are obvious, the pain has usually been present for a while. Dogs are built to hide discomfort. Your job as an owner is to know the subtle signs well enough to catch it early.

Watch the whole dog. Watch the patterns. A single changed behaviour might be nothing. Two or three changed behaviours together, even subtle ones, is your dog telling you something is wrong. Trust that signal and call your vet.

Keep Reading

Browse our full library of dog health and behaviour guides at the Pawsidor blog for practical, vet informed answers to every question dog owners ask.

Related Posts

Sources:
AKC: Signs your dog is in pain.
American Veterinary Medical Association: Animal pain awareness.
Cornell University College of Veterinary Medicine: Arthritis in dogs.
World Small Animal Veterinary Association: Global pain council guidelines.
International Association for the Study of Pain: Animal pain.
McConnell, P. (2002). The Other End of the Leash. Ballantine Books.
McMillan, F. (2005). Mental Health and Well-Being in Animals. Blackwell Publishing.
Holton, L. et al. (2001). Development of a behaviour-based scale to measure acute pain in dogs. Veterinary Record.

Sources & References

  1. Horowitz, A. (2009). Inside of a Dog. Scribner.
  2. Bradshaw, J. (2013). Cat Sense. Basic Books.
  3. McConnell, P. (2002). The Other End of the Leash. Ballantine Books.

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