Why Is My Dog Drooling While Sleeping? (Top Reasons)

Drooling is normal for all canines. It’s a natural, healthy bodily function that helps dogs to eat and digest food. However, if your dog slobbers excessively while asleep or awake, it can be a sign of a severe problem.

Why is My Dog Drooling While Sleeping

If you’re wondering why your dog drools while sleeping, here are some of the reasons. Some of the reasons are natural, while others are due to an underlying issue. Continue reading to find out.

Type Of Dog Breed

Drooling is usual in dog breeds, such as the Mastiff, Bloodhound, Newfoundlands, and Saint Bernard. These dog breeds normally slobber because their head or lip conformations cannot keep the amount of drool they produce. This results in slobbering.

Besides, these dog breeds also have extra skin around their muzzle and lips, which enable saliva to gather in the folds. Therefore, when these dogs sleep, the saliva flows from their flews or loose upper lips.

If you have such a dog breed at home, you should place a towel on the head of the dog as it sleeps. This will give you ample time as you won’t have to clean up the drool.

Night Dreams

Just like humans, dogs also have dreams of their own while sleeping. Therefore, if your dog doesn’t drool while sleeping, it may be because it has a sweet dream. Maybe the dog is dreaming of juicy bones or food in general.

Nonetheless, if the problem recurs daily, then your dog may have another issue that’s disturbing her.

Foreign Objects

Another common reason why dogs drool while asleep or awake is due to foreign objects in the mouth. Inspect your dog’s mouth and see if there are food particles lodged on the teeth. Inspect the teeth, tongue, and gums for any particles.

If you come across objects in the mouth, such as shards of bones, plants, splinters, cloth, or hooks, you should remove them. Additionally, you should brush your dog’s teeth more often and maintain good oral hygiene.

If the object feels stuck in the mouth, don’t forcefully remove it; instead, visit a veterinarian.

Mouth & Throat Problems

Visiting the vet once in a while is crucial. This is because some issues can be detected early and treated. For instance, if your dog has a fractured tooth or tumor in the mouth or throat, or esophagus, swallowing will be a problem.

As a result, it can cause the dog to slobber as there will be saliva build-up until it slobbers from the mouth.

To avoid such issues from occurring, keep a keen eye on your dog’s dental formula. Always check if there are brown or yellow plaque in the dog’s mouth. Also, red and inflamed gums mean that the dog needs some proper teeth cleaning.

Stomach Problems

If your dog digests undesirable or certain foods accidentally, this may cause drooling. Apart from that, the dog may also have stomach problems. Therefore, if you suspect your dog is slobbering because of digesting an undesirable, you should visit a vet right away.

Toxic substances can cause drooling. Some plants are poisonous to your pet when ingested. This, if your dog consumes them, they may end up drooling even when asleep.


During summers, when temperatures are high, even at night, many dogs drool. If your dog usually drools excessively during the summer, you should have nothing to worry about.

It’s also important to note that some dog breeds are affected by heatstroke to a greater extent than others. Such dog breeds include bulldogs, pugs, boxers, and Boston terriers.

Poisonous Plants & Animals

As stated earlier, your dog can feed on some plants and animals that will cause them to drool. Plants like Azaleas, Tulips, and Chrysanthemums can make your dog slobber and even become ill.

Ensure that your dog doesn’t feed on these plants or animals as it will drool excessively.

Underlying Conditions

Apart from natural drooling, your dog may drool while sleeping because it has a particular underlying problem. It can be an organ disease such as a kidney or liver problem or a respiratory infection.

As a dog ages, they are more likely to fall sick. That’s why you need to take them for a checkup at least twice a year. Types of respiratory infections that can cause drooling are nose, sinuses, or throat infections.

Liver and kidney diseases can cause hypersalivation, which leads to excessive drooling. Always have your dog checked if you suspect it has an underlying issue.

Possible Treatments For Unusual Drooling

If you notice that your dog is drooling unusually, you should take quick action. But first, you need to find out why it’s drooling. As stated above, some dogs may drool naturally, while others may have an underlying issue.

When your dog starts to drool excessively, you should take it to the vet right. But before that, you should make your dog comfortable and give it enough water. Afterward, you can take it to a veterinarian for a checkup and treatment.

Stop guessing or assuming that your dog will be fine when it drools unusually. For instance, diseases like cancer and rabies can have a lasting impact on your dog if left untreated in their early stages. So, take quick action and save your furry friend.


Drooling is normal for certain types of dog breeds or when they contact certain plants and animals. However, excessive or unusual drooling while asleep may mean something else.

Thus, if you notice that your dog is slobbering unusually while asleep, you should give it enough water and visit the veterinarian right away.

Your dog may be having an underlying issue that may cause more significant problems in the long run. Let the vet diagnose your dog so that you can both have peace of mind.

We hope that this article has enlightened you, and you will take the necessary action toward your drooling dog! If it’s natural, then you have nothing to worry about.