My Dog Is Shaking or Trembling: Could It Be Poisoning?
Shivering vs. true tremor, the toxins that cause tremors (compost, slug bait, stimulants), and when it's an emergency.
Shivering from cold or stress is common and benign. True tremors, rhythmic, whole-body or limb shaking that doesn't stop when you calm and warm the dog, are a different signal entirely, and several serious toxins announce themselves exactly this way.
Treat as an emergency if
- Tremors are constant or worsening, or progress to rigid posture or seizure
- There was any access to compost, moldy trash, snail bait, or human medications
- Body temperature feels very hot: sustained tremors overheat dogs dangerously
- Your dog also vomits, staggers, or seems disoriented
Toxins with tremors as the headline sign
Tremorgenic mycotoxins from compost or moldy food are the classic cause: fast onset, sometimes violent. Snail and slug bait (metaldehyde) causes severe tremors and is a minutes-matter emergency. Chocolate, caffeine, hops, macadamias, and stimulant medications (ADHD drugs, pseudoephedrine) all produce tremor at sufficient doses.
Shivering vs. tremor: the 60-second check
- Warm the dog, lower the stress, offer a treat: shivering from cold/anxiety typically pauses for food and fades with comfort.
- True toxic tremor persists through distraction, often worsens, and frequently comes with drooling or wobbliness.
- Old-dog hind-leg tremble at rest that disappears when walking is common and worth a routine (not emergency) vet chat.
What the vet will do
For toxin-driven tremors: control the tremor with medication, manage body temperature, decontaminate if recent, and run supportive fluids. Outcomes are strongly tied to how fast treatment starts, which is why persistent tremor is a now problem, not a tomorrow problem.
Available 24/7. A consultation fee may apply.