Short answer: dogs shake for many reasons. Cold, fear or stress, a quick shake after play, and being wet are common ones. Pain, illness, a seizure or something they ate can also cause it. The next step is simple: look at what else is going on, and call your vet if the shaking is sudden, keeps going, or comes with other changes. A quick call is always fine.
When it is the cold
Shivering is how a dog warms up. Move your dog somewhere warm and give them a cozy bed or a coat or sweater on cold days. If your dog is shivering and also seems sluggish, call your vet.
When it is fear or stress
A scared or worried dog may tremble, often with other signs. Look for panting, hiding, a tucked tail, ears pinned back, yawning or lip licking, or the whites of the eyes showing. Common triggers are fireworks, storms, loud noises, vet visits and being left alone. Gently move away from what is worrying them if you can. If it keeps happening, ask your vet to check your dog is well, then ask for a qualified behaviorist to help.
When it is a shake-off
A full-body shake after a bath or a swim, or after play or a stressful moment, is normal. It is a short, quick shake, and your dog goes back to normal right after. Nothing to do here, though it is worth noticing what your dog just went through.
When it could be pain or illness
Shaking can be a sign that a dog is sore, unwell or feeling sick. It is more likely if the shaking is sudden, or comes with limping, a hunched back or tiredness. Shaking in the back legs, especially in an older dog, can mean achy joints or weaker muscles. Call your vet and describe what you are seeing. Some dogs also get a tremor condition that a vet can diagnose and treat, so it is always worth having ongoing shaking checked.
When your dog may have eaten something
Shaking, twitching or wobbliness after your dog may have eaten something, such as a plant, a human food or a medicine, needs a call to your vet straight away. Please do not wait to see if it passes. Take any packaging with you, and tell your vet what it was and roughly when.
When it could be a seizure
A seizure can look like shaking, but your dog may also go stiff, fall over, seem unaware of you, or wee or poo without meaning to. Stay calm and stay close. Move your dog away from stairs or furniture, clear a little space, and keep the room quiet and dim. Keep your hands away from their mouth. If you can do so safely, time the seizure and take a short video. Call your vet immediately if it lasts more than two minutes, another seizure follows, or your dog does not start to recover. If your vet is closed, call an emergency vet. Do not wait for five minutes or for the seizure to stop before calling. Follow your vet's instructions about urgent treatment and transport. A seizure lasting more than five minutes is prolonged and needs emergency treatment. After any seizure, contact your vet, including a first seizure. Do not restrain your dog or transport them during a seizure unless your vet tells you to.
When it is hot
Shaking on a hot day, especially with heavy panting, needs a call to your emergency vet right away.
What to do next
If there are no emergency signs, take a breath and look at the whole picture. For a possible seizure, poisoning or overheating, follow the urgent advice above rather than waiting. Ask yourself four things: Is your dog cold, wet or just out of the water? Is something scaring them? Did they eat something they should not? Do they seem sore or unwell? If the shaking stops once the cause is gone, you can relax. If you cannot tell why your dog is shaking, it is sudden, it does not settle, or your dog seems sore or is not acting like themselves, please call your vet. If they are closed, an emergency vet can help.
General education only, not veterinary advice or a plan for your individual dog. If your dog is shaking and you are worried, please contact a vet. See our legal page.
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Sources & care notes
Sources: Dogs Trust, shaking: dogstrust.org.uk. Blue Cross, signs of stress, storm anxiety and seizures. RSPCA, poisoning, heatstroke and cold weather. PDSA, seizure first aid, when to call during a seizure. VCA, stress signs, seizures and shaker syndrome. AVMA, cold weather. PetMD, why dogs shake.
This article is general education, not veterinary advice. If your dog seems unwell, is in pain, or something changed suddenly, call your vet. If it could be an emergency, do not wait.
Frequently asked questions
Why do dogs shake or tremble?
Many reasons: cold, fear or stress, a quick shake-off after play, and also pain, illness, seizures or something eaten.
What does shivering from cold look like?
It stops with warmth. If your dog shivers and also seems sluggish, call your vet.
Is a shake after a bath normal?
Yes. A short, quick full-body shake your dog recovers from at once is ordinary.
When is trembling an emergency?
With the whites of the eyes showing, a tucked tail, panting or hiding it is fear. A possible seizure goes straight to the vet.
