What can be the reason fof post prandial shivering of this 35 old puppy
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post prandial shivering tremors puppy causes portosystemic shunt hypoglycemia
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Post-Prandial Shivering in a 35-Day-Old Puppy - Possible Causes
The video clearly shows generalized fine-to-moderate body tremors occurring after eating, with the puppy appearing lethargic and keeping its eyes closed. The owner's audio (in Hindi: "khana khane ke baad aise kaapta hai" - "it shakes like this after eating") confirms this is strictly post-prandial (after feeding). This is a clinically significant sign. Here are the most likely causes ranked by probability:
1. Congenital Portosystemic Shunt (PSS) / Hepatic Encephalopathy - Most Likely
This is the top differential for post-prandial neurological signs in a young puppy.
- In a PSS (liver shunt), an abnormal blood vessel bypasses the liver, so dietary proteins are absorbed from the gut and their toxic metabolites (primarily ammonia) are not cleared by the liver
- These toxins go directly to the brain, causing hepatic encephalopathy (HE) - which presents as tremors, lethargy, aimless wandering, head pressing, or seizures
- Crucially, symptoms worsen AFTER eating because food intake triggers a spike in ammonia and other toxins
- Toy breeds (Yorkies, Maltese, Pugs, Miniature Schnauzers) are most commonly affected, but any breed/mix can have this condition
- Wisconsin Veterinary Neurology notes that "symptoms often worsen after eating" as a hallmark sign
2. Neonatal/Juvenile Hypoglycemia - Very Common in Puppies This Age
- At 35 days, puppies have immature glucose regulation and very limited glycogen stores
- Paradoxically, eating itself can trigger reactive hypoglycemia in fragile pups - a surge in insulin outpaces glucose supply
- Signs: tremors, muscle twitching, weakness, lethargy, pale mucous membranes, and in severe cases, seizures
- PMC review on hypoglycemia in dogs lists "muscle tremors/fasciculations" and "altered mentation" as key signs of neuroglycopenia
- A PSS can also directly cause hypoglycemia by impairing hepatic gluconeogenesis
3. Gastrointestinal Pain / Nausea
- Shivering is a classic pain response in dogs
- The puppy may be experiencing gastric cramping, gas, bloating, or esophageal/GI discomfort post-feeding
- This is less serious than the above but still requires investigation
4. Cold / Thermoregulatory Failure
- Neonates up to 4 weeks have poor thermoregulation; at 35 days it's improving but still immature
- Eating triggers increased blood flow to the gut (splanchnic circulation), which can briefly divert heat from the periphery
- However, given the strict post-prandial pattern, a metabolic cause is far more likely
5. Milk Protein Intolerance / Food Sensitivity
- If transitioning to solid food or different milk, intolerance reactions can cause GI distress and shivering
- Less likely to cause neurological-appearing tremors
Recommended Workup
Take this puppy to a vet urgently and share this video. Ask for:
| Test | What It Rules Out |
|---|---|
| Pre/post-prandial bile acids | Portosystemic shunt (most important test) |
| Blood glucose (stat) | Hypoglycemia |
| Serum ammonia | Hepatic encephalopathy |
| CBC + chemistry panel | Liver function, electrolytes, overall health |
| Abdominal ultrasound | Can visualize the shunt vessel directly |
Bottom line: Post-prandial tremors in a 35-day-old puppy are a red flag sign. A congenital portosystemic shunt with hepatic encephalopathy and/or juvenile hypoglycemia are the most serious and likely explanations. Both are treatable - PSS can be surgically corrected with good outcomes when caught early. Please do not delay veterinary evaluation.
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