Dogs may shake off water, shiver on a cold day or tremble during fireworks. But shaking that is new, persistent or paired with weakness is worth investigating. The same movement can have very different causes, so avoid choosing a calming remedy before checking for illness.
When shaking is urgent
Seek emergency veterinary care if your dog collapses, has a seizure, cannot stand, is struggling to breathe, develops a swollen painful abdomen, or may have swallowed medication or another toxin. Shaking with severe vomiting, diarrhea, confusion or intense pain also needs prompt assessment. If a seizure is happening, keep the area safe and avoid putting your hands in the dog’s mouth.
Possible reasons a dog trembles
Cold, fear and excitement may cause brief shivering, but pain, fever, nausea, toxin exposure, metabolic abnormalities and neurologic problems can also trigger shaking. Trembling after exercise may occur with fatigue or injury. A dog that shakes only during a thunderstorm may be fearful; one that suddenly trembles while resting with poor appetite needs a medical evaluation first.
What to do while arranging veterinary advice
Move the dog into a comfortable, quiet location and note whether warming or reducing stress helps. Check for other symptoms without forcing painful movement. Keep records of what your dog ate, any medication or flea-product changes and possible toxin exposure. Never give a human painkiller, sedative or muscle relaxant unless prescribed for that dog.
What your veterinarian may investigate
The clinician will consider the timing and type of tremor, responsiveness, pain, temperature, neurologic function and any exposure history. Blood work, urinalysis or imaging may be recommended. Cornell’s emergency guidance identifies collapse, seizures, severe pain and breathing difficulty as reasons for immediate care. A dog that is trembling with lethargy may need additional tests.
When anxiety management is appropriate
If a veterinarian excludes an urgent medical cause and shaking clearly relates to a trigger, a behavior plan may help. Provide a safe retreat, avoid punishment and practice gradual counterconditioning. Medication may be appropriate for some dogs after veterinary evaluation; it is not a universal solution. Our dog anxiety guide covers training and veterinary treatment options, while the lethargy guide addresses unusual weakness.
This article provides general education; it is not an individualized diagnosis.
This article is for general education and is not a substitute for care from your own veterinarian. Learn about The Pet Vet and our editorial policy.