Why is my dog or cat limping?

• Limping is a sign of pain or injury, not a specific diagnosis.
• Non-weight-bearing, obvious pain, deformity or recent trauma = see a vet now.
• A mild limp with no severe pain may improve with strict rest — but recheck if it worsens or lingers.
• Never give human painkillers; several are toxic to pets. Don't manipulate a painful leg.

What a limp means

Lameness means a pet is limping, moving unevenly, or not using a leg normally. It can come from pain, weakness, swelling, a paw problem, a joint or ligament issue, a muscle or tendon injury, or a nerve problem. Vets grade lameness roughly from a subtle limp up to non-weight-bearing (not using the leg at all) — and the more severe or sudden it is, the more urgent.

Because pets can't tell us where it hurts, and often look better in the excitement of the clinic, a short video at home can genuinely help your vet.

Common causes to consider

These are categories a vet thinks through — not a diagnosis of your pet:

• Paw problems — a torn nail, cut pad, thorn or foreign object between the toes.
• Soft-tissue injury — a sprain, strain or bruise from a slip or over-activity.
• Joint disease — arthritis (common in older and larger pets), or developmental problems.
• Ligament injury — such as a cruciate injury in the knee of dogs.
• Fracture or dislocation — usually after trauma; a veterinary emergency.
• Bite wounds or infection — an abscess can cause sudden, painful limping, especially in cats.
• Illness — some tick-borne and other illnesses can cause shifting lameness.

Dogs vs cats

Dogs commonly limp from paw injuries, sprains, cruciate ligament problems and arthritis. Cats are experts at hiding pain — they may simply rest more, jump less or go quiet rather than limp obviously — so a cat that is limping, or suddenly not jumping, deserves attention. Cat bite-wound abscesses are a frequent, painful cause of sudden limping. In both species, a leg that won't bear weight is a red flag.

What to check, and what you can safely do

Before and during a vet call, it helps to note:

• Which leg, and whether any weight goes on it
• Sudden or gradual; after activity or an obvious incident
• Any swelling, wound, bleeding, or a leg that looks bent
• Check the paw and between the toes for cuts, thorns or a torn nail
• Pain when the leg moves — note it, but don't force it
• Fever, dullness or reluctance to move (points to something bigger)

When to see a veterinarian

Monitor / routine: a mild limp, still bearing some weight, in a bright pet with no severe pain or swelling — strict rest for a day or two, then recheck.

Same day: a limp that's worsening, not improving after a couple of days' rest, recurring, or accompanied by swelling, a wound, or a quiet, off-colour pet.

Emergency: won't bear any weight, cried out and can't use the leg, obvious deformity or bone showing, limping after a fall, road accident or fight, or severe pain.

What the vet may check

Your vet performs a lameness examination — watching your pet stand and walk, then feeling the limb for swelling, pain, instability or reduced movement — and reviews any history of injury. They may recommend X-rays or other imaging, and sometimes blood tests, to localise the problem. Pain relief is an important part of treatment and must be prescribed by your vet.

Frequently asked questions

Sources