Other health problems

My Dog Is Making Weird Mouth Movements

Laura García Ortiz
By Laura García Ortiz, Veterinarian specialized in feline medicine. June 1, 2021
My Dog Is Making Weird Mouth Movements

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When a dog moves their mouth as if they were chewing, grinding their teeth or chattering, one possible cause is bruxism. Also known as teeth grinding, bruxism is a clinical sign which arises from various causes. The result is often your dog making weird movements with their mouth. This can be very disconcerting, especially since it looks like the dog is very anxious. Bruxism in dogs is usually accompanied by other clinical symptoms, depending on their origin. Chattering and grinding can result in decay of the teeth, something which can incur various secondary problems.

At AnimalWised, we investigate why my dog is making weird mouth movements. We find out what are the causes of bruxism, what treatment options are available and whether there might be some other issues at play.

You may also be interested in: My Dog's Mouth is Dry


  1. Epilepsy
  2. Periodontal disease
  3. Malocclusion
  4. Dental pain
  5. Stress
  6. Gastrointestinal disease
  7. Cold temperatures
  8. Stop a dog making weird mouth movements


As we have explained in the introduction, bruxism is not a disease. Rather, it is a symptom of various diseases. For this reason, understanding why our dog makes weird mouth movements can be difficult. One of the first, and most serious, reasons for dogs chattering is epilepsy.

Epilepsy on dogs consists of an abnormal electrical activity in the brain due to the spontaneous depolarization of nerve cells. The result is not only strange mouth movements, but it can cause seizures which cause short-term alterations in the dog's behavior. It is the most common neurological disorder in canines. As a consequence of epilepsy, a dog may move their mouth, grinding their teeth and moving their jaw in weird ways.

Epilepsy in dogs presents the following phases:

  • Prodromal phase: characterized by restlessness in the dog. It precedes the seizure stage and can last from minutes to days.
  • Aura phase: during this phase there is a motor skill, sensory, behavioral or autonomic dysfunction. It is a phase that lasts from seconds to minutes before the triggering of a seizure or epileptic attack.
  • Seizure phase: consists of the seizure or epilepsy phase itself. This can be focused if they affect a single part of the brain. Epilepsy is a group of neurological disorders, signified by the seizure phase. Fits can occur in specific areas such as the face or a limb, or be generalized if it affects the whole brain. In the latter case, the dog can lose consciousness, hypersalivate, move their limbs and display rapid involuntary contractions of the muscles.
  • Postictal phase: as a result of exhaustion at the brain level, dogs may find themselves somewhat dejected, aggressive or with gait disturbances.

It is possible for the dog to have minor epileptic episodes without us even noticing. It may occur on such a small levels that the symptoms the dog might feel are reduced to feeling a little odd. This is something which can be difficult for us to detect, so the dog may have epilepsy for some time before it is diagnosed.

Periodontal disease

Periodontal disease occurs after the formation of bacterial plaque on the teeth of dogs. Accumulated food remains food serve as a substrate for the oral bacteria of dogs, which begin to multiply rapidly and form plaque. This plaque comes into contact with canine saliva and yellowish tartar forms that adheres to the teeth. Also, the bacteria continue to multiply and feed, spreading towards the gums, causing them to inflame and potentially bleed (gingivitis).

Dogs with periodontitis will likely develop mouth pain caused by bruxism. The weird mouth movements movements can wear down the teeth, exacerbated by gingivitis. It will also likely result in halitosis (bad breath). In addition, as the disease progresses, tooth decay and bacteria enter the blood system via the blood vessels. This can cause septicemia, affecting internal organs leading to symptoms of digestive, respiratory and cardiac disease.


Malocclusion is the misalignment or improper growth of a tooth. It often results in the teeth not meeting correctly when the mouth is closed. Prognathism is a related condition whereby either the upper or lower jaw sticks out. It results in an imperfect bite which has various effects, including the dog making weird mouth movements.

Malocclusion in dogs can be of three types:

  • Prognathism: the lower jaw is more advanced than the upper. This type of malocclusion is common in certain dog breeds and is even part of their breed standard. These breeds include the Boxer, the English Bulldog and the Pug.
  • Brachignatism: also called a parrot mouth, it is a hereditary disorder that consists of the upper jaw moving ahead of the lower one, with the upper incisors in front of the lower ones.
  • Crooked mouth: this is the worst form of malocclusion and consists of one side of the jaw growing faster than the other, twisting the mouth.

Associated clinical signs are teeth grinding when performing normal mouth movements, food coming out of the mouth when chewing and a predisposition to infection or injury when chewing. Brachycephalic dog breeds are often affected, a situation which is exacerbated by continued breeding of individuals from a smaller genetic pool.

Dental pain

Like people, dogs with toothache also chatter their teeth to manage the pain. This is usually a reflex movement, but it can also cause more pain.

Unlike people, dogs cannot communicate with us and bruxism is sometimes the only clinical sign that indicates a painful dental process. These could be it inflammatory disease, neoplastic problems, an infection or a dental fracture. When puppies start to lose their baby teeth and their permanent teeth grow through, you may see them grinding their teeth or making weird movements.


Stressful situations and anxiety problems in dogs can cause them to manifest strange mouth movements, one of many possible signs of stress. Grinding teeth often incurs in stressed or anxious dogs while they sleep. It is possible to observe that the dog seems to be chewing, constantly sticking out and sticking their tongue or moving their mouth rapidly as a consequence of this stress or anxiety.

Although dogs are less sensitive to stress than cats, they can also suffer stress from similar situations. These can include moving, introducing new animals, new family members, frequent noises, illness, anger or discomfort of the caregiver or changes in routine. However, this reaction in dogs is much less common than in people.

Gastrointestinal disease

Similar to what happens with tooth or gum pain, when a dog has pain due to a disease along the digestive tract, it can manifest it with bruxism.

Esophageal disorders such as esophagitis, gastritis, gastric or intestinal ulcers and other diseases of the esophagus, stomach and intestine can cause a dog to do strange things with the mouth. This is usually due to the pain and discomfort emanating from further down in their digestive tract, where there are other symptoms we may not be able to see.

Cold temperatures

The cold can greatly affect our dogs, causing hypothermia and thus endangering their health. One of the first symptoms of hypothermia in dogs is tremors. These can happen all over the body, but teeth chattering is often one of the initial symptoms.

Subsequently, the respiratory rate is reduced, clumsiness, drowsiness, dry skin, lethargy, low blood pressure, reduced heart rate, hypoglycemia, depression, pupillary dilation, staring, depression and collapse may occur. This depends on how far the condition progresses before treatment is administered. If the dog's temperature lowers sufficiently, it will be fatal.

Making weird mouth movements is only one of the many strange things dogs may do. It doesn't mean they are all signifiers of a health problem, something we explain further in our video below:

Stop a dog making weird mouth movements

Detecting the underlying cause is the first step in treating a dog's teeth grinding or chattering. For example, if they have hypothermia, their body temperature will need to be raised back to normal. If they have an infection, dental disease or any other issue which requires treatment, we will need to see a veterinarian.

However, some dogs have conditions which cannot be treated easily. For example, dogs with pragnathism often never have their misaligned jaw corrected. Instead, management of their symptoms is required. This means they may need to eat a soft food diet and we need to be very careful of any possible dental issues.

Prevention of this problem involves maintaining their overall health. In particular, we will need to check their dentition regularly and maintain oral hygiene (e.g. brushing the dog's teeth regularly).

This article is purely informative. AnimalWised does not have the authority to prescribe any veterinary treatment or create a diagnosis. We invite you to take your pet to the veterinarian if they are suffering from any condition or pain.

If you want to read similar articles to My Dog Is Making Weird Mouth Movements, we recommend you visit our Other health problems category.

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My Dog Is Making Weird Mouth Movements