Why is my dog shaking?
Shaking and trembling covers a wide range, from a cold whippet to a genuine emergency. Most of the time the cause is obvious from the situation — temperature, fear, or excitement. It matters when the shaking has no obvious trigger, will not settle, or comes with any other change.
Usually not urgent
This is common and often manageable at home — but see a vet if it persists, gets worse, or comes with other changes.
Start with the situation
Cold is the simplest explanation and the most common one in the UK. Thin-coated and lean breeds, puppies and older dogs lose heat quickly, and a wet dog in wind loses it faster still. If the shaking stops once they are dry and warm, that was the answer.
Fear and anxiety produce trembling with a recognisable shape: it comes with a tucked tail, flattened ears, pacing, panting, hiding or clinginess, and it maps onto something — fireworks, a vet visit, a lorry going past. It stops when the trigger does.
Excitement shakes plenty of dogs too, particularly small ones, and it is self-limiting. If it happens at the door when you come home, it is not a symptom.
Old age brings tremors in the back legs of many dogs, often from muscle loss or arthritis rather than anything acute. Worth mentioning at the next check-up rather than an emergency.
When shaking is a warning
Ring your vet the same day if the shaking has no obvious trigger and does not settle, if your dog is also vomiting, off their food, weak or unsteady, if they are panting heavily without having exercised, or if they seem to be in pain — a hunched back, a tense belly, a reluctance to be touched.
Treat it as an emergency if you think they may have eaten something they should not have. Poisoning can present as tremors, and several common household and garden items are involved: chocolate, xylitol in sugar-free products, some human medicines, slug pellets, antifreeze. Do not wait to see how it develops.
Shaking that progresses into a full seizure — collapse, paddling, loss of awareness — is a separate and urgent situation.
What helps in the meantime
For cold, dry them thoroughly and warm them gradually rather than fast. A coat is worth having for thin-coated dogs in a British winter, and a bed off a cold floor makes more difference than most owners expect.
For fear, the instinct to reassure is fine — comforting a frightened dog does not reinforce the fear. What helps more is somewhere enclosed and quiet to retreat to, and reducing the trigger where you can rather than exposing them to it.
For anything you cannot explain, write down when it happens, how long it lasts and what else is going on. That record is worth more to your vet than a description of one episode.
What can help
Things we stock that owners commonly use alongside a vet’s advice — not a substitute for it.
Ice-Silk Cooling Dog Bed with Bolster Edge
A breathable ice-silk cooling bed with a soft bolster edge and a cool-touch centre panel that helps your dog stay comfortable through warm weather. No need to freeze or refrigerate, it cools naturally on contact.
From£12.99
Hooded Dinosaur Dog Raincoat
A waterproof hooded dog raincoat with a fun dinosaur spine and yellow fins. It features full-coverage legs, a reflective strip and a built-in D-ring for a lead, keeping smaller dogs dry and visible on wet walks.
From£29.99
Dog Sports Jacket For Medium & Large Breeds
A sleek zip-up sports jacket with full leg sleeves and reflective trim, designed to keep medium and large dogs warm and dry on cold-weather walks. Easy-fit and snug at the cuffs.
From£24.99
L-Shaped Bolster Sofa Dog Bed
A supportive L-shaped sofa bed with a raised bolster back and side for your dog to rest their head. The thick padded base cushions joints, and the soft rose-velvet cover is removable and washable for easy care.
From£44.99
Common questions
- Why is my dog shaking but acting normal?
- Usually cold, excitement or mild anxiety, especially in small or thin-coated dogs. If they are eating, drinking and moving normally and the shaking settles, it is rarely urgent — but a new pattern with no trigger is worth a call.
- Is my dog shaking because they are in pain?
- It can be. Pain-related trembling usually comes with other signs: a hunched posture, reluctance to move or be touched, panting, or a change in appetite. That combination is worth a same-day appointment.
- My dog is shaking after fireworks — what should I do?
- Give them somewhere enclosed and quiet, muffle the noise, and stay with them if that helps. Comforting a frightened dog does not make the fear worse. If fireworks are a yearly problem, plan with your vet well before the season.
- Can shaking mean poisoning?
- Yes. Tremors are one presentation of poisoning, and chocolate, xylitol, some human medicines, slug pellets and antifreeze are all common causes. If there is any chance your dog has eaten something, ring a vet straight away rather than waiting.
- Why do older dogs shake in their back legs?
- Often muscle loss or arthritis rather than anything sudden. It is worth raising at a routine check-up, since pain relief and joint support can make a real difference to comfort and mobility.
Related
Sources
Written against guidance published by UK veterinary and welfare organisations. Always confirm specifics with your own vet.
Written by Matt Garnett, who runs Giddy Pets and is a lifelong pet owner — not a vet. This is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your animal. How we write these guides.