When a Puppy Has a Seizure: What Every New Owner Should Know

In this guide

Watching a puppy seize is frightening, even for owners who know it is usually not immediately life threatening. Understanding the common causes and the right response can make those minutes far less overwhelming.

Common causes in puppies

• Hypoglycaemia (low blood sugar), especially in toy breed puppies who have gone too long without food
• Intestinal parasites, common in puppies with a high worm burden
• Infections, including canine distemper in unvaccinated puppies
• Congenital liver conditions such as a portosystemic shunt
• Toxin ingestion, including certain plants, chocolate, or household chemicals
• Idiopathic epilepsy, which usually appears a little later, often between six months and three years of age

What a seizure looks like

• Sudden collapse, stiffening, or paddling of the limbs
• Loss of consciousness or control, sometimes with drooling, urination, or defecation
• In milder, focal seizures, twitching of just the face or one limb, or strange, glassy eyed staring

What to do during a seizure

• Stay calm and time the seizure
• Clear the area of anything the puppy could injure itself on
• Do not put your hands near the mouth, puppies cannot swallow their tongue and you risk a bite
• Dim lights and keep noise low
• Once it ends, keep the puppy warm and calm, and call your vet

When it is a genuine emergency

A seizure lasting more than two to three minutes, several seizures in a row without full recovery in between (cluster seizures), or a first ever seizure in a very young puppy all need immediate veterinary attention. Since hypoglycaemia is such a common and easily corrected cause in toy breed puppies, mention feeding history to your vet, and never withhold food from a young puppy for long stretches.

Common Questions

Q: Will my puppy outgrow hypoglycaemia related seizures? A: Often yes, particularly once a toy breed puppy passes the four to six month mark and its glucose reserves and metabolism mature.

Q: Should food be withheld during recovery from a seizure? A: No, offering a small amount of food once the puppy is alert enough to eat helps prevent another blood sugar drop rather than risking one.

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