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Symptoms of Hypoglycemia in Puppies

The signs of low blood sugar can be vague. It’s important to watch out for them especially if your puppy is a tiny breed that’s most susceptible. Without enough sugar, the puppy’s heartbeat rate and breathing slow down, triggering a cascade effect of other symptoms.

Be alert for any one or a combination of atypical behavior and symptoms.

  • Acting weak

  • Becoming very sleepy

  • Disorientation

  • A wobbly “drunk” gait

  • "Glassy" and unfocused eyes

  • Twitching, shaking, trembling, or shivering

  • Head tilted to one side

  • Seizures

  • Unconsciousness that can't be interrupted

Without prompt attention and first aid, your puppy could die. But fortunately, when you recognize the signs early in the process, low blood sugar is easy to treat and reverse at home.

In almost all cases, the puppy will respond very quickly to treatment, within five or 10 minutes. However, if treatment doesn’t reverse the symptoms within this time frame, take your puppy to the veterinarian immediately as something else could have caused the signs.

Even when your dog responds quickly it’s a good idea to have the vet check it sometime that day to be sure everything is as it should be.


When you catch the symptoms early and seek treatment immediately, most puppies are fine. But without prompt help puppies can fall into a coma, and their breathing or heartbeat may stop.

  • For all symptoms: When the blood sugar drops, puppies can’t regulate their body temperature. It’s important to keep the dog warm until the glucose level rises enough to burn for energy. Wrap your puppy in a blanket, and snuggle it with a hot water bottle or heating pad. This can also slow down the effects of shock.

  • For sleepy behavior: Getting sugar into the puppy will counteract all these symptoms. Often, you’ll notice the wooziness when it’s been a while since the puppy’s last meal. So as soon as you notice puppy woozy behavior, offer it something to eat. Make it something smelly and yummy that you know he’ll eagerly snarf up, like a tablespoon or two of canned food.

  • For "drunk" behavior: A highly concentrated sugar source like Karo syrup, pancake syrup or honey can work even more quickly. Just be sure your puppy is still able to swallow before giving about a teaspoonful of the sugar source. If the dog is very groggy, offer a bit of water first. You can use a syringe if the dog doesn't lap up the sugar water. Check to be sure the dog swallows, and then offer the syrup. It should be able to lap it up from the spoon.

  • For seizures: Once the seizure has finished, or when the puppy has fallen unconscious, you can still administer a sugar source; the dog doesn’t need to be able to swallow. It will be absorbed directly through the mucous membranes in the puppy’s mouth and transferred into the bloodstream. Honey works best for this. Rub the honey on the inside of the dog's lips and gums, and watch for recovery in five to 15 minutes. You can drive your puppy to the vet clinic during this period.

How to Prevent Hypoglycemia

When your puppy has suffered from a bout of hypoglycemia, you’ll know to be alert for the signs of low blood sugar in the future. You can also take steps to prevent the problem, especially if your puppy is a high-risk pet.

  • Add two tablespoons of Karo syrup to your puppy’s water for all day sipping. Be sure to dump it out and add fresh each day or the sugar water could grow bacteria.

  • Schedule several meals every day. Young puppies have trouble eating enough food at one setting. So a small meal several times a day helps keep the blood sugar levels normal.

  • Put dry food out all the time, in a puzzle toy ball, for intermittent snacking. You can measure this amount, too, and regulate how much the puppy gets. This will help prevent puppy obesity while providing healthy blood sugar levels.

Most adult dogs won’t have problems with hypoglycemia. However, playing and running too hard without rest can cause low blood sugar even in adults that are not toy breed dogs. It’s up to pet parents to stay watchful and make sure the puppy and maturing dog eat right and maintain healthy food habits.

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