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Breathing with Open Mouth (Panting) in cats

Author: Dr. med. vet. Gisa Löwe | Last modified: 17.02.2026

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Definition

Open-mouth breathing, also known as panting, is a symptom in which a cat breathes through its mouth, which is normally atypical for cats. This behavior can indicate various health problems and should be carefully observed.

Can Occur with the Following Diseases:

Basics and possible causes

Open-mouth breathing is unusual in cats, as they normally breathe through their nose. This behavior can be attributed to stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being., anxiety, or physical exertion. However, it is important to note that such conditions typically occur only temporarily and should subside quickly.

One of the most common causes of panting in cats is heat. Cats do not have many sweat glands and regulate their body temperature primarily through panting or licking their fur. So if a cat is in a very warm environment, it may start panting to cool down.

Another reason could be respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. diseases, such as asthma, pneumonia, or an upper respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease.. These conditions make it difficult for the cat to breathe through its nose, forcing it to breathe through its mouth.

Heart disease is also a possible cause. A weakened heart can result in the body not receiving sufficient oxygen, which in turn causes the cat to breathe faster and deeper to take in enough oxygen.

Pain and stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. are also important factors that can triggerA trigger is a stimulus that elicits a specific reaction or state. In veterinary medicine, this can refer to emotional responses, such as fear or aggression, or medical conditions, such as seizures in dogs and cats. panting in cats. When a cat is in pain, whether from an injury or illness, this can affect its breathing patterns. Similarly, stress—for example, from a change in environment or the presence of other animals—can lead to such behavior.

Finally, poisonings or reactions to certain medications can triggerA trigger is a stimulus that elicits a specific reaction or state. In veterinary medicine, this can refer to emotional responses, such as fear or aggression, or medical conditions, such as seizures in dogs and cats. panting in cats. Some toxicToxic means "poisonous" and refers to substances that can have harmful effects on the body, including damage to organs, cells, or disruption of metabolic processes. substances and medications can affect the airways or strain the heart, which can lead to an increased respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. rate.

Typical accompanying symptoms

Increased respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. rate: A cat that is panting often also shows a generally increased respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. rate. This can mean that it is breathing faster than normal, even when at rest.
Weakness: Cats that pant frequently also show signs of weakness or lethargy. They may be less active or lie down more than usual.
Loss of appetite: A decreased interest in food can be an accompanying symptom, especially if the panting is due to illness or pain.
Physical signs of stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being.: These include erect ears, dilated pupils, and raised fur. These can occur when panting is triggered by fear or stress.
Bluish tongue or mucous membranes: This is a more serious sign that can indicate oxygen deficiencyDeficiency means a lack or absence of a necessary substance required for normal bodily functions or health, such as vitamins, minerals, or hormones.. In such cases, immediate veterinary assistance is required.
Cough or gagging: These symptoms may indicate respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. diseases that can cause panting.
Changes in behavior: A panting cat might also behave differently, for example, hide more or become aggressive.

When to see a vet?

A veterinarian should be consulted if panting lasts longer than a few minutes or if other symptoms such as weakness, loss of appetite, or a bluish tongue occur. These signs can indicate serious health problems that require immediate attention.

It is especially important to consult the veterinarian if panting occurs suddenly and without apparent reason. This could indicate an acuteAcute refers to a condition that occurs suddenly and is usually of short duration. In a medical context, it describes symptoms or illnesses that can quickly become serious and require immediate attention. emergency such as a heart attack or severe allergic reaction.

If a cat continues to pant despite rest and a cool environment, a veterinarian should also be consulted to rule out serious illnesses.

Recurring panting that occurs repeatedly without obvious cause also requires veterinary examination to diagnose and treat underlying chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. conditions.

Symptom recognition for the pet owner and veterinary diagnostic procedure

For the pet owner, it is important to carefully observe the panting and accompanying symptoms and report them to the veterinarian as detailed as possible. Information about the duration of panting, frequency, and possible triggers can be valuable for diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients..

The veterinarian will first carry out a thorough clinical examination to assess the general health of the cat. This includes listening to the heart and lungs to identify abnormal sounds or rhythms.

Further diagnostic tests may be performed, such as chest X-rays to check lung structure, blood tests to check organ function, and cardiac ultrasoundUltrasound refers to sound waves that are above the hearing threshold of the human ear. In medicine, ultrasound is used for diagnostic imaging procedures to visualize internal organs, tissues, and blood flow. to assess heart health.

An electrocardiogramSee ECG. (ECG) may also be necessary to analyze the electrical activity of the heart and identify possible heart problems.

In some cases, further specialized tests, such as a bronchoscopyBronchoscopy is a diagnostic and therapeutic procedure in which the inside of the airways is directly viewed with a bronchoscope, a thin, flexible viewing tube. It can be used to take tissue samples or remove foreign objects. or computed tomography (CT)Computed tomography (CT) is an imaging technique that uses X-rays and computer technology to create cross-sectional images of the body. It enables a detailed view of bones, organs, and other structures and is used for the diagnosis of injuries, diseases, and for planning medical interventions., may be required to obtain more precise information about the condition of the airways.

What the pet owner can do and professional therapy options

The pet owner can initially try to calm and cool the cat’s environment. A cool, quiet environment can help reduce panting, especially if it is triggered by heat or stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being..

It is important to provide the cat with access to fresh water to prevent dehydrationDehydration occurs when the body loses more fluid than it takes in. This can lead to a number of problems, including headaches, Dizziness, and in extreme cases, renal failure or Cardiovascular collapse.. Adequate fluid intake can help regulate body temperature and facilitate breathing.

If possible, the cat should be kept away from sources of stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being., such as loud noises or other animals that could cause restlessness.

The pet owner should observe the cat closely and not hesitate to seek immediate veterinary attention if there are signs of deterioration or if additional symptoms occur.

Under no circumstances should medications be administered without a veterinarian’s instruction, as this could worsen the situation. It is important to have the cause of panting professionally evaluated to ensure appropriate treatment.

Outlook on current research

In current research, the symptom of panting in cats is being intensively studied to better understand how it differs from normal breathing patterns and which specific physiological processes are involved. Scientists use advanced imaging techniques such as CT scans and MRIs to analyze the airways and lung structure of cats in real time. These technologies help identify subtle changes or abnormalities that could be associated with abnormal panting.

Another area of research focuses on the genetic factors that could influence panting in cats. Researchers are investigating whether certain breeds or genetic predispositions increase the risk of respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. distress. By analyzing DNADNA (deoxyribonucleic acid) is the molecule that carries the genetic instructions for the development, function, and reproduction of all known living organisms and many viruses. It is located in the cells of an organism and contains the information for heredity. samples and creating genetic profiles, scientists are attempting to identify potential genetic markers that correlate with panting.

Additionally, the role of environmental factors and stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. is being examined. Studies have shown that cats in stressful situations or in environments with poor air quality are more likely to start panting. Researchers are working to identify specific environmental factors that triggerA trigger is a stimulus that elicits a specific reaction or state. In veterinary medicine, this can refer to emotional responses, such as fear or aggression, or medical conditions, such as seizures in dogs and cats. or worsen panting and are developing strategies to improve the living conditions of cats.

Research is also examining the use of new technologies to monitor the respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. rate and breathing patterns of cats at home. Wearable technologies that monitor heart and respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. rate are gaining popularity and could provide veterinarians with valuable data to better assess the health of cats. These devices can enable continuous monitoring and help detect abnormal breathing patterns early.

Finally, the effectiveness of various treatment approaches for panting is being investigated. This includes both medication therapies and alternative approaches such as physiotherapyVeterinary physiotherapy encompasses a range of treatment methods aimed at improving the mobility and well-being of animals through exercise, massage, and other manual techniques. and breathing exercises. The results of these studies could help develop better treatment protocols specifically tailored to the needs of cats.

Frequently asked questions

What does it mean if a cat is breathing with its mouth open? Open-mouth breathing in cats, also called panting, can be a sign of stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being., overheating, or respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. problems. It is not typical for cats and should be observed, especially if it occurs frequently or is accompanied by other symptoms.
Is panting in cats always a cause for concern? Panting can indicate a serious problem, especially if it occurs without apparent reason such as exertion or heat. In such cases, a veterinarian should be consulted.
How does panting in cats differ from that of dogs? Cats do not normally pant as often as dogs. In dogs, panting is a normal means of temperature regulation, while in cats it tends to indicate stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. or health problems.
Can certain medications cause panting in cats? Yes, some medications can cause panting as a side effectA side effect is an unwanted reaction to a medication or treatment. In animals, side effects can range from mild and temporary to severe and potentially life-threatening.. It is important to check the side effects of medications and inform the veterinarian if unusual behavior occurs.
Are there home remedies for panting in cats? While there are some home remedies that can help, such as creating a cooler environment or reducing stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being., panting should in most cases be examined by a veterinarian.
Can overweight in cats lead to panting? Yes, overweight cats can be more susceptible to respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. problems, as the extra weight can press on the airways. A healthy diet and regular exercise are important to reduce this risk.
How can I tell if my cat’s panting is normal? Observe the circumstances under which your cat is panting. If it occurs without apparent reason or persists for longer, it is advisable to consult a veterinarian.
Can respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. diseases cause panting in cats? Yes, respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. diseases such as asthma or infections can lead to panting. An accurate diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. is important to ensure the right treatment.
How can stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. affect panting in cats? StressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. can increase respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. rate and lead to panting. It is important to identify and minimize stressStress refers to the state of an organism reacting to external stimuli or demands. In veterinary medicine, stress can have physical or psychological effects on animals, impacting their health and well-being. factors to improve the cat’s well-being.
When should I take my cat to the vet if it is panting? If the panting occurs frequently, is accompanied by other symptoms, or your cat shows signs of discomfort, you should see a veterinarian as soon as possible.