The Hidden Language of Pain in Cats and Dogs: How to Recognise It
Cats and dogs instinctively hide pain, and it's often mistaken for 'old age.' The behavioural signs, how pain works in the body, and how it's assessed.
Bulut Veterinary Clinic Medical Team
Reviewed by Mücahid Çiftçioğlu, DVM
'If she were in pain we'd know — she'd whine' is one of the most common, and sadly most misleading, sentences we hear at the clinic. Cats and dogs usually show pain not by crying out but by quietly changing their behaviour. And because an animal that shows weakness in the wild becomes a target, hiding pain is a deeply ingrained instinct.
The practical consequence is this: the signs we do notice are often written off as 'old age' or 'a change in personality,' and pain can go on silently for years. We wrote this as a layered answer to the question you might ask a vet: 'Is my animal in pain, and if so, how would I know?' What pain means in the body, which behaviours give it away, how we assess it, and what's done about it.
What is pain, and what is it for?
Pain isn't a flaw — it's an alarm system. Tissue damage, inflammation, or pressure stimulates pain-sensing nerve endings (nociceptors); this signal travels up the spinal cord to the brain, where it becomes the experience of 'pain.' Its purpose is clear: to move the animal away from what's harming it and to make it protect the injured area. A limping dog refusing to put weight on a paw is that protective program in action.
Splitting pain in two matters for management. Acute pain is sudden and temporary — an injury, the period after surgery, an acute colic — and it settles once the cause resolves. Chronic pain lasts for months (osteoarthritis, for instance) and can, over time, increase the nervous system's sensitivity to pain, turning into a self-reinforcing problem. The most dangerous thing about chronic pain is that, because it settles in slowly, both owner and animal 'get used to it.'
Why do they hide it so well?
Cats and dogs don't show pain the way we expect, because their 'pain language' is behaviour more than sound. For a prey animal, visible weakness is danger; so an animal in pain often goes quiet, withdraws, and silently scales back its daily routine rather than complaining.
Cats are even better at this than dogs. A cat in pain usually doesn't cry out; instead it hides more, neglects grooming, and stops jumping up high. These changes creep in so gradually that many families only realise in hindsight — 'actually she hadn't been playing like she used to for months.' That's exactly why catching pain takes observing more than listening.
Behavioural signs of pain in dogs
In dogs, pain most often shows through changes in movement and behaviour. No single sign is diagnostic; it's several appearing together — especially newly — that matters:
- Limping, favouring a leg, struggling to sit and rise, reluctance on stairs or jumping into the car
- Less enthusiasm for walks, play and greetings; lying down more
- Guarding a particular area, tensing or shying away when it's touched, becoming grumpy
- Persistent licking or chewing — a dog may keep licking the painful area
- Personality change: a normally gentle dog becoming irritable, snappy, or withdrawn
- Postural change: a hunched back, tense belly, a low-carried head
- Reduced appetite, restless sleep, panting, and unexplained weight loss
Behavioural signs of pain in cats
In cats pain is even more subtle, and it's often read as 'she's just aged and calmed down.' Watch for these cat-specific changes:
- Stopping jumping up high (bed, windowsill, furniture), or getting up only hesitantly, in stages
- Reduced grooming: a messy, dull, matted coat — or, conversely, over-licking one spot
- Hiding more, avoiding interaction, not coming for a lap
- Litter box trouble: going at the edge or outside it (climbing in and out can be painful)
- A hunched, crouched posture; the tense 'meatloaf' position with paws tucked under
- Loss of appetite, grumpiness, intolerance to touch; tension in the face (squinted eyes, flattened ears)
How is pain assessed? What we do in the exam
Because animals can't tell us 'where and how much it hurts,' assessing pain means reading a whole picture. The first and most valuable source is you: your observations at home — what they've stopped doing and for how long, which movement has become hard — often set the direction of the exam. If you can, capture the moments of difficulty (limping, stairs, jumping) on your phone; the stress of the clinic can mask these signs.
In the exam the vet watches the animal's posture and gait, then carefully palpates the joints, spine, abdomen and mouth to locate the painful area and gauge the reactions. In veterinary medicine, routinely assessing pain as a kind of 'fourth vital sign' — an approach highlighted by the guidelines of bodies such as WSAVA — has become increasingly established.
When needed, we turn to further tests to clarify the cause: X-rays for joints and bone, blood and urine work and ultrasound for internal organs, an oral assessment for dental pain. The aim isn't just to say 'there is pain' but to find its source and build the right treatment — because treating pain depends entirely on its cause.
Pain management: options and important warnings
In modern veterinary medicine, pain management rests not on a single pill but on a layered approach. The priority is always to treat the cause; on top of that, different tools are added as appropriate:
- Cause-directed treatment: resolving an infection, wound, dental disease, or the underlying condition
- Pain-relief medication under veterinary supervision — drug choice and dose belong entirely to the vet
- Weight control: excess weight is a direct and most-overlooked driver of joint pain
- Physiotherapy and controlled exercise: movement and muscle support in chronic joint pain
- Environmental adjustments: non-slip flooring, a low-sided litter box, ramps, soft and reachable beds
- In chronic pain, regular review and re-tuning of treatment over time
The most critical warning: never medicate on your own
This is the most vital point about pain. Most pain relievers sold for people (especially drugs like paracetamol and ibuprofen) are lethally toxic to cats and dogs; paracetamol can kill a cat at even a very small dose. The 'one little tablet won't hurt' idea leads to preventable poisonings every year.
Even if you have a veterinary pain reliever that was previously prescribed, don't increase the dose or frequency on your own. Painkillers often suppress the symptom while hiding the cause; used incorrectly, they can seriously harm the stomach, kidneys and liver. The right approach is clear: when you suspect pain, turn to your vet, not the medicine cabinet.
Living long-term with a companion in pain
Chronic pain — especially osteoarthritis in older companions — is usually a condition that's 'managed' rather than 'cured'; but managed well, quality of life improves markedly. Your strongest tool here is regular observation: what they start doing again, or keep avoiding, is the most honest indicator of whether treatment is working.
Making life easier for an animal in pain at home often comes down to small changes: rugs on slippery floors, a ramp or step to favourite spots, reachable food and water, a soft warm bed. Our clinic is open 24/7; don't wait if there's sudden severe pain, tenderness too intense to touch, pain with loss of appetite, or an inability to move — these need urgent assessment.
Frequently asked questions
My cat never cries out, so she isn't in pain, right?
Unfortunately, no. Cats almost never show pain by crying out; hiding, reduced grooming, no longer jumping up high, and grumpiness are far more reliable signs. The assumption that 'no sound means no pain' is the most common reason pain is missed in cats. If there's a behaviour change, it's worth assessing.
My dog has slowed down with age — is that pain or just normal ageing?
Much of the slowing we put down to 'old age' is actually treatable joint pain. Difficulty getting up and down, reluctance on stairs and into the car, and less enthusiasm for play are often signs of pain rather than harmless ageing. The good news: this pain is manageable, and many dogs visibly brighten with treatment.
In an emergency at home, can I give half of my own painkiller?
Absolutely not. Most human painkillers, especially paracetamol and ibuprofen, cause lethal poisoning in cats and dogs; paracetamol is deadly to cats at even a very small dose. When you suspect pain, the only right step is to call the clinic without wasting time; ours is open 24/7.
The painkiller helped, so do I still need the vet?
A painkiller suppresses the symptom but often hides the cause; an underlying problem can keep growing silently. Relief is a good sign, but the diagnosis and cause-directed treatment shouldn't be put off. Dose and duration are entirely up to the vet — for a firm diagnosis and safe treatment, an assessment is strongly recommended.
What should I prepare for a pain-related visit?
Your observations are the most valuable thing: note which movement has become hard and for how long, and what they've stopped doing. If you can, film the moments of difficulty (limping, stairs, jumping); the stress of the clinic can mask them. The food they eat, any medications, and when the problem started also speed up the exam.
Related services
If there's a change in your companion where you'd say 'not like before,' it can be the sign of silent pain — reach out for a pain assessment; we're here 24/7.
This article is for general information only and is not a substitute for a veterinary examination. Always consult your veterinarian about decisions concerning your pet's health.