Tank shook on every car ride for the first year I owned him. Pure anxiety. Same dog, four years later, doesn't shake at all. Cause matters more than the shake itself.
What's actually causing it
The 7 most common causes.
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Cold
Especially for small or short-coated dogs. Dachshunds, Chihuahuas, Pit Bulls all shiver in cold weather. Body temperature drops faster than in larger breeds.
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Fear or anxiety
Thunderstorms, fireworks, car rides, vet visits. Stress hormones cause involuntary muscle tremors. Often paired with panting, pacing, hiding.
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Excitement
Some dogs shake when they're excited — meeting you at the door, anticipating food, before a walk. Happy shaking. Tail usually wagging.
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Pain
Hidden pain (back issues, abdominal pain, joint problems) often shows as shaking. Especially in dachshunds, where IVDD presents as shivering plus a hunched posture.
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Old age (tremors)
Senior dogs sometimes develop benign tremors in their head or hind legs. Usually not dangerous but worth a vet check the first time.
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Toxin exposure
Poisoning (chocolate, xylitol, certain plants, antifreeze) often causes tremors as an early symptom. This is an emergency.
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Generalized Tremor Syndrome
Also called 'shaker syndrome,' more common in small white breeds (Westies, Maltese, Bichons). Treatable but needs vet diagnosis.
Red flags
When to actually worry.
- ·Shaking paired with vomiting, diarrhea, drooling, or lethargy (possible toxin)
- ·Sudden onset with no obvious trigger (cold, excitement, fear)
- ·Dachshund or other long-back breed shaking + hunched posture (possible IVDD — emergency)
- ·Shaking that doesn't stop within 20-30 minutes after removing the trigger
- ·Shaking + difficulty walking, balance loss, or facial drooping
Practical steps
What to actually do.
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Rule out cold first: warm them up with a blanket and see if it stops.
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Rule out fear: remove the trigger if you can identify it.
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Check their last few hours: any access to chocolate, grapes, xylitol, medications, plants?
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If shaking persists more than 30 minutes with no clear cause, call your vet.
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For chronic anxiety shakes, see my [pit bull car anxiety guide](/blog/pit-bull-car-anxiety/) — the techniques work for any fearful dog.
Sunday letter
One honest review. Every Sunday.
Plus the occasional photo of Rex destroying something he wasn't supposed to. About 400 words. Skip a week and I'll understand.
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