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Why Is My Dog Shaking or Trembling? When to See a Vet

Dogs shake or tremble for many reasons, from excitement and cold to pain, anxiety and serious neurological conditions. Most episodes are harmless, but some require urgent veterinary attention. This guide helps you distinguish between the two.

Common Benign Causes of Dog Shaking

Many dogs shake when cold, excited or anxious — all perfectly normal responses. Small or short-coated breeds are particularly prone to shivering in cold weather, and adding a dog coat or jacket in winter is a practical solution. Post-bath shaking is the body's efficient method of removing water.

Excitement trembling is common in puppies and highly stimulable dogs — the trembling typically resolves quickly once the exciting stimulus is removed. Some dogs tremble in anticipation of a walk or at mealtimes.

Fear-induced trembling is associated with anxiety triggers: fireworks, thunderstorms, car journeys, visits to the vet or groomer. This type of shaking often co-occurs with other anxiety signs — panting, yawning, lip-licking, trying to hide. If your dog shows significant anxiety-related trembling regularly, a consultation with your vet about anxiety management is worthwhile.

Pain as a Cause of Trembling

Pain is an underappreciated cause of trembling in dogs. A dog in pain — from arthritis, an injury, abdominal discomfort or dental pain — may shiver or tremble as a response to the physical sensation or associated stress. This is often accompanied by other signs: reluctance to move, hunching, changes in posture or unusual quietness.

Older dogs who suddenly start trembling warrant particular attention, as this may indicate the onset of a painful condition such as spinal disease, hip dysplasia or osteoarthritis. A vet consultation that includes a pain assessment is important if trembling has appeared without an obvious trigger.

Abdominal pain specifically — including from bloat (gastric dilatation-volvulus), pancreatitis or intestinal obstruction — can cause whole-body trembling. If your dog is shaking, hunching, has a distended abdomen, or is retching without vomiting, treat this as an emergency.

Neurological and Medical Causes

Tremors with a neurological basis look different from anxiety or pain-related shaking — they often appear rhythmic, consistent and may persist at rest. Idiopathic tremor syndrome (also called 'White Shaker Syndrome') affects small white-coated dogs including Maltese and West Highland White Terriers, causing whole-body tremors that respond to steroid treatment.

Distemper, a viral disease preventable by vaccination, can cause neurological tremors. Hypoglycaemia (low blood sugar) — more common in puppies and toy breeds — causes trembling, weakness and in severe cases collapse. If your small dog or puppy is trembling and appears weak or unresponsive, offer a small amount of sugary food and contact a vet immediately.

Ear problems, particularly vestibular disease (sudden onset dizziness and disorientation in older dogs), can cause trembling alongside head tilting and loss of balance. Thyroid disease and Addison's disease can also manifest with trembling.

Toxin Ingestion and Poisoning

Trembling or shaking is a common sign of poisoning in dogs. Many common toxins — including xylitol (artificial sweetener), chocolate, metaldehyde (in some slug treatments), permethrin (in some flea products for cats applied to dogs), and certain plants — can cause tremors, seizures and other serious neurological signs.

If trembling has started suddenly, is severe, or is accompanied by vomiting, diarrhoea, dilated pupils or apparent disorientation, suspect poisoning and contact an emergency vet immediately. The Animal Poison Line (01202 509000) can advise on specific toxins.

Don't wait and see with suspected poisoning — prompt treatment significantly improves outcomes for most toxin ingestions. Tell the vet if your dog may have accessed any household products, medications, garden treatments or human foods in the preceding hours.

When Trembling Is an Emergency

Certain presentations alongside trembling require immediate emergency vet attention: suspected poisoning or toxin ingestion; collapse or loss of consciousness; seizures; swollen abdomen; extreme distress or unresponsiveness; and trembling in a puppy that appears weak or unresponsive.

For less acute trembling without these additional signs — shaking that started recently, is mild, and occurs alongside normal eating, drinking and behaviour — a vet appointment within 24–48 hours is appropriate. Contact your vet for triage advice if unsure.

Out-of-hours vet consultations average £275.72 in the UK — a significant cost, but one that may be necessary for a genuinely unwell animal. The Animal Poison Line can help triage toxin-related trembling before you decide whether to go to emergency.

Find a Vet Near You

If your dog is trembling and you're unsure of the cause, contact a vet for advice. Use CompareMyVet at app.comparemyvet.uk to find local vet practices near you, including out-of-hours emergency services for urgent presentations.