How to Tell If Your Pet Is in Pain

Many animals instinctively mask pain. In the wild, showing weakness can invite danger. That survival instinct still shows up in domestic animals, which means dogs, cats, rabbits, horses, birds, and other pets may hide discomfort until it becomes significant.

Cats are especially skilled at masking pain. Some dogs may still wag their tails, eat, or seek affection while uncomfortable.

This does not mean your pet is trying to deceive you. It means subtle changes in behavior, movement, appetite, grooming, or routine can be important signals.

There is no single universal pain signal across all species, yet there are patterns worth noticing.

Behavioral changes

• Becoming withdrawn, hiding, or unusually quiet
• Sudden aggression or snapping when touched, especially in an area they usually tolerate
• Restlessness, pacing, or difficulty getting comfortable
• Loss of interest in play, interaction, or activities they normally enjoy
• Seeming “off” in a way you cannot clearly explain

Physical signs

• Limping, favoring a limb, or moving more stiffly than usual
• Reluctance to jump, climb stairs, get into a car, or do familiar movements
• Hunched posture, tucked abdomen, or altered stance
• Facial tension, squinting, ears pulled back, or a furrowed expression
• Rapid, shallow breathing or panting when not hot or recently active
• Excessive licking, chewing, or grooming of a specific area

Eating and drinking changes

• Reduced appetite or refusing food
• Dropping food while eating, which can suggest mouth or dental pain
• Increased or decreased water intake

Vocalization

• Whimpering, whining, crying, or vocalizing when moving or being touched
• Unusual vocalization in cats, including yowling
• Unusual silence in an animal that is normally vocal

Elimination changes

• Accidents from a previously house-trained pet
• Straining or crying when urinating or defecating
• Avoiding the litter box or going outside the usual area
• Changes in posture while urinating or defecating

Some variation is normal. Context matters. A dog may be less energetic on a hot day. A cat may sleep more after a busy or stressful event. The question is whether the change makes sense, resolves quickly, or continues.

Worth monitoring for 12–24 hours:

• Mildly lower energy with no other symptoms
• Slightly reduced appetite after a stressful event, such as travel, loud noises, or a household change
• Minor stiffness after heavy exercise in an otherwise healthy animal

Worth calling your veterinarian soon:

• Any behavioral or physical sign above that persists
• Limping or favoring a limb that does not resolve quickly
• Appetite changes lasting more than a day
• Noticeable changes in how your pet moves, holds their body, or interacts with you
• Pain signs that are mild yet new, unexplained, or worsening

Seek emergency care immediately:

• Inability to urinate, especially in male cats
• Difficulty breathing
• Paralysis or sudden inability to use limbs
• Collapse or loss of consciousness
• Crying out in severe distress
• Bloated, hard, or visibly painful abdomen
• Seizures
• Eye injuries or sudden vision changes
• Major trauma or rapid deterioration

If you see emergency signs, do not wait. Contact an emergency veterinary clinic immediately.

Pain does not look the same in every animal.

Dogs may show pain through limping, whining, restlessness, seeking comfort, or avoiding movement. Some dogs, especially stoic or working breeds, may continue eating, playing, or trying to please you while uncomfortable.

Cats often show pain more subtly. Changes in grooming, social withdrawal, hiding, reluctance to jump, changes in litter-box habits, and subtle posture changes may be the first clues. A cat that stops jumping onto a favorite perch, or hides in the closet or under the bed, is giving you useful information.

Small animals, including rabbits, guinea pigs, and birds, may hide pain very effectively. In birds especially, showing illness or pain can be a survival risk, so obvious signs may mean the situation is already serious. Any meaningful change in a small animal or bird deserves a prompt veterinary call.

Senior pets may have chronic pain from arthritis, dental disease, or other age-related conditions that are easy to dismiss as “just getting old.” Slowing down, stiffness, difficulty rising, irritability, reduced grooming, or less interest in normal activities can have treatable causes. It is worth asking.

Step 1: Observe what has changed. When did you first notice it? Is it constant or intermittent? Is it worse after activity, after rest, at a certain time of day, or when touched in a specific area? The more specific you can be, the more useful that information is to your veterinarian.

Step 2: Do not give human pain medication. Many common human pain relievers — including ibuprofen (Advil), acetaminophen (Tylenol), naproxen, and aspirin — can be dangerous or toxic to pets. Never give medication unless your veterinarian specifically directs you to do so for that pet.

Step 3: Call your veterinarian. Even when you are not sure it is urgent, it is appropriate to call. Describe what you are seeing calmly and specifically. Your veterinary team can help determine whether your pet should be seen immediately, scheduled for an appointment, or monitored at home.

Step 4: Do not wait for things to get worse. Many pet owners hesitate because they are not sure the concern is serious enough. If you are asking the question, the call is reasonable. You do not need a diagnosis before you ask for guidance.