TL;DR: Dog trembling is a non-specific symptom that can range from harmless excitement to serious medical issues; seek veterinary care within 24 hours for constant shivering, or immediately if it occurs with lethargy or vomiting.
What does it mean if my dog is trembling or shivering?
Trembling or shivering in dogs involves involuntary, rhythmic muscle contractions. While humans often associate shivering exclusively with being cold, in dogs, it is a non-specific clinical sign. This means it can be a physical manifestation of many different internal states, ranging from simple behavioral excitement to serious neurological issues or physical pain.
When is dog trembling considered a veterinary emergency?
- Medium Urgency: If your dog is shivering continuously but remains alert, responsive, and is not vomiting, you should contact your veterinarian for an appointment within the next 24 hours.
- High-Priority Emergency: If the trembling is accompanied by a distended abdomen, extreme lethargy, or signs of poisoning, it must be treated as an immediate emergency.
How does a photo or video of my dog's shivering help the triage team?
- Capturing a video allows the vet to distinguish between generalized shivering, localized muscle fasciculations, or focal seizures.
- A visual record helps determine if the issue is musculoskeletal, neurological, or related to toxin ingestion before you even step into the clinic.
- Because tremors vary in frequency and intensity, a video provides the most accurate clinical picture for the triage team.
Clinical Context (Merck Veterinary Manual)
Trembling or shivering in dogs can be caused by various factors, including certain toxins such as chlorinated hydrocarbons, which may progress to convulsions and death. Tick paralysis can also disrupt thermoregulation, leading to both hyperthermia and hypothermia; in severe cases, shivering may be absent. Sudden hyperthermia may manifest as exaggerated head and foreleg movements along with anxiousness. Profound hypothermia can mimic tick paralysis. Behavioral changes, such as abnormal postures, head pressing, or aggression, may also be observed.
Chapter: Toxicology
Source: The Merck Veterinary Manual, 11th Edition (Page 3062)