TL;DR: While dog trembling can be a simple response to cold, it may also indicate stress, pain, or illness. Seek immediate veterinary care if shivering is accompanied by vomiting, lethargy, or loss of balance.
What causes my dog to tremble or shiver?
Trembling or shivering refers to involuntary, rhythmic muscle contractions that make your dog appear to be shaking. While this can be a simple response to feeling chilly, it is often a physical manifestation of internal stress, pain, or an underlying medical condition. When it occurs indoors in a temperature-controlled environment, it typically signals that your dog is reacting to something other than the weather.
When is dog trembling considered a veterinary emergency?
- The urgency level for a dog trembling indoors is generally classified as Medium.
- If your dog is trembling but still alert, eating, and behaving normally, monitor them and schedule a routine veterinary appointment.
- If the trembling is paired with extreme lethargy, vomiting, or a loss of balance, contact an emergency clinic immediately as these can be signs of toxicity or severe pain.
How can a video of my dog's trembling help a veterinarian?
- Providing your veterinarian with a video of the trembling episode is one of the most effective ways to assist in a diagnosis.
- Dogs often experience a surge of adrenaline at the vet clinic that can cause symptoms to temporarily disappear.
- A clear video allows the vet to observe the specific type of movement and the duration of the event.
- Visual evidence helps the vet determine if your dog remains conscious and responsive, which helps differentiate between chills, anxiety, or neurological issues.
Clinical Context (Merck Veterinary Manual)
In older dogs, trembling may be associated with the aging process and progressive, irreversible changes in body systems, including hepatic or renal failure, endocrine disorders such as Cushing's disease, pain, sensory decline, or diseases affecting the central nervous system or circulation, such as anemia or hypertension. Fear and phobias, such as thunderstorm or firework phobia, can also manifest as trembling. Furthermore, whole-body tremors involving the limbs, trunk, head, and eyes can occur, lessening during rest but reappearing with arousal or excitement; this can be associated with difficulty standing or ambulating and may be a sign of a demyelinating disorder.
Chapter: Behavioral, Geriatrics, Neurology
Source: The Merck Veterinary Manual, 11th Edition (Page 1569)