cat panting with mouth open

Why Is My Cat Panting With Her Mouth Open?

Cats are fascinating creatures with their own unique behaviors and habits. One behavior that may raise concern for cat owners is when their furry friend starts panting with an open mouth. While dogs are known to pant frequently, seeing a cat do it may leave you wondering if something is wrong. In this blog post, we will explore the reasons why cats may pant with an open mouth and what it could mean for their health. Understanding your cat's behavior is crucial for their well-being, so let's dive in!

Normal vs. Abnormal Cat Panting

When it comes to cat panting, it's essential to understand the difference between normal and abnormal panting. Cats may pant normally in certain situations, such as after exercise or when they're feeling hot. However, abnormal panting can be a sign of an underlying health issue that requires attention.

Normal Panting

  • After exercise or play
  • In hot environments
  • As a response to stress or excitement

Abnormal Panting

  • Excessive panting without apparent cause
  • Panting that lasts for an extended period of time
  • Panting accompanied by other symptoms such as lethargy or loss of appetite

If you notice any abnormal panting behavior in your cat, it's essential to monitor them closely and seek veterinary attention if the behavior persists or worsens.

Medical Conditions That May Cause Panting In Cats


Heatstroke is a serious condition that can occur when a cat's body temperature rises to dangerous levels. This can happen when a cat is exposed to high temperatures for an extended period, such as being left in a car on a hot day or spending too much time in direct sunlight.

Symptoms of heatstroke in cats may include panting with an open mouth, lethargy, vomiting, diarrhea, seizures, and collapse. If you suspect your cat is experiencing heatstroke, it's crucial to act quickly and take the following steps:

  1. Move your cat to a cooler location.
  2. Offer your cat cool, fresh water to drink.
  3. Place cool, damp towels on your cat's body to help lower their temperature.
  4. Contact your veterinarian immediately for further instructions.

Preventing heatstroke in cats is crucial, especially during the hot summer months. Ensure that your cat has access to shade and plenty of fresh water at all times. Avoid leaving your cat in a car or other enclosed area without proper ventilation. If you plan to take your cat outside, consider doing so during the cooler parts of the day or providing a shaded area for them to rest.

Respiratory Problems

Respiratory problems can also cause a cat to pant with an open mouth. Some of the most common respiratory problems that can affect cats include:

  1. Asthma: This is a chronic condition that causes inflammation and narrowing of the airways, making it difficult for the cat to breathe. Common symptoms include coughing, wheezing, and labored breathing.
  2. Upper Respiratory Infections: These infections are common in cats, especially those that live in crowded environments like shelters or catteries. Symptoms include sneezing, nasal discharge, and difficulty breathing.
  3. Lung Disease: This includes conditions like pneumonia, which can cause difficulty breathing and panting in cats.

If your cat is experiencing any respiratory problems, it's important to seek veterinary attention immediately. Treatment options will vary depending on the specific condition, but may include medications such as bronchodilators or antibiotics. In some cases, hospitalization may be necessary.

Preventing respiratory problems in cats involves keeping them in a clean and stress-free environment. Regular veterinary check-ups and vaccinations can also help prevent respiratory infections. If you have multiple cats, it's essential to isolate any cat showing symptoms of a respiratory infection to prevent the spread to other cats.

Heart Problems in Cats

Heart problems are another potential cause of panting in cats. Some of the most common heart problems in cats include:

  1. Hypertrophic Cardiomyopathy: This is a condition in which the walls of the heart become thickened, making it difficult for the heart to function properly. Symptoms may include panting, difficulty breathing, lethargy, and loss of appetite.
  2. Heartworm Disease: This is a parasitic infection that can cause damage to the heart and lungs. Symptoms may include coughing, difficulty breathing, and panting.
  3. Congestive Heart Failure: This occurs when the heart is unable to pump blood effectively, leading to a buildup of fluid in the lungs and other tissues. Symptoms may include panting, coughing, and difficulty breathing.

If you suspect that your cat is experiencing any heart problems, it's essential to seek veterinary attention immediately. Treatment options will depend on the specific condition but may include medications, dietary changes, or surgery in some cases.

Preventing heart problems in cats involves maintaining a healthy weight, providing regular exercise, and feeding a balanced diet. Regular veterinary check-ups can also help detect any potential heart problems early on. If your cat is diagnosed with a heart condition, it's important to follow your veterinarian's recommendations for treatment and management to ensure your cat's continued health and well-being.

Other Possible Causes Of Cat Panting

In addition to heatstroke, respiratory problems, and heart problems, there are other possible causes of cat panting, including:

  1. Pain: Cats may pant with an open mouth as a response to pain, especially if the pain is related to their respiratory or cardiovascular systems.
  2. Overheating: Just like dogs, cats pant to regulate their body temperature. If your cat is panting with its mouth open, it may be a sign that they're too hot and need to cool down. This is especially common in cats during the summer months or in hot climates.
  3. Anxiety or Stress: Cats may pant as a response to anxiety or stress. This can be caused by various factors, such as loud noises, changes in the environment, or separation anxiety.
  4. Poisoning: Certain toxins, such as antifreeze or pesticides, can cause panting in cats.
  5. Obesity: Overweight or obese cats may pant more frequently due to the extra weight putting pressure on their respiratory system.
  6. Infection: Certain infections, such as pyometra or sepsis, can cause panting in cats.
  7. Illness or injury: Panting can also be a symptom of an underlying medical issue or injury. If your cat is panting with its mouth open and also exhibiting other symptoms such as lethargy, loss of appetite, or coughing, it may be a sign of a respiratory problem, heart disease, or other medical conditions.

If you notice any unusual panting behavior in your cat, it's important to seek veterinary attention to determine the underlying cause and appropriate treatment. Your veterinarian may perform diagnostic tests such as bloodwork, x-rays, or ultrasound to help identify the cause of your cat's panting. Early detection and treatment can help ensure the best possible outcome for your cat's health and well-being.

Behaviors That May Indicate A Problem

Aside from panting with an open mouth, there are other behaviors that may indicate a problem in cats, such as:

  1. Rapid breathing: Rapid breathing, also known as tachypnea, is when a cat's breathing rate is faster than normal. Normal breathing for a cat is between 20 and 30 breaths per minute. If your cat is breathing faster than this and also exhibiting other symptoms such as panting, lethargy, or coughing, it may be a sign of a respiratory problem or other medical issue.
  2. Excessive drooling: While cats do produce saliva, excessive drooling can be a sign of a problem. If your cat is drooling excessively and also exhibiting other symptoms such as panting, difficulty swallowing, or loss of appetite, it may be a sign of an oral issue or other medical condition.
  3. Lethargy or decreased appetite: If your cat is panting with its mouth open and also showing signs of lethargy or decreased appetite, it could be a sign of an underlying medical issue. Cats are known for their independent nature, but sudden changes in behavior such as reduced activity levels or loss of interest in food should not be ignored.

It's important to pay attention to your cat's behavior and seek professional help if you notice any unusual symptoms. While some of these behaviors may be normal in certain situations, it's always best to err on the side of caution and have your cat evaluated by a veterinarian.

What To Do If Your Cat Is Panting With Its Mouth Open

If your cat is panting with its mouth open, here are some steps you can take to ensure their well-being:

  1. Assess the situation: If your cat is panting, take a moment to observe their behavior and the environment they're in. If they're in a warm room or have been active, it may be normal panting to regulate their body temperature. However, if they're exhibiting other symptoms or seem distressed, it's best to seek professional help.
  2. Help your cat cool down: If your cat is panting due to overheating, provide them with a cool and comfortable place to rest. This can be a cool tile floor, a shady spot outside, or even a cool water bath. Avoid using ice or extremely cold water, as this can cause shock.
  3. Monitor their breathing: Keep an eye on your cat's breathing and heart rate. If their breathing is very fast or labored, or if their heart rate is high, it may be a sign of an underlying medical issue.
  4. Seek veterinary help: If your cat is panting excessively or exhibiting other symptoms such as lethargy, loss of appetite, or coughing, it's important to seek professional help from a veterinarian. They can evaluate your cat and determine if there's an underlying medical issue that needs treatment.

Remember, panting with an open mouth can be a normal behavior in certain situations, but if you notice any unusual symptoms or your cat seems distressed, it's always best to consult with a professional. By taking the appropriate steps and seeking help when needed, you can ensure your cat stays healthy and happy.


In conclusion, cats panting with their mouths open can be a cause for concern, but it's important to understand the reasons behind this behavior and take appropriate action. Whether it's due to overheating, stress or anxiety, or an underlying medical issue, it's important to monitor your cat's behavior and seek professional help if needed. By providing your cat with a comfortable and safe environment, helping them cool down if necessary, and seeking veterinary care when needed, you can ensure your furry friend stays healthy and happy. Remember, as a cat owner, it's your responsibility to keep a watchful eye on your pet and seek help if you notice any unusual symptoms or behaviors. does not intend to provide veterinary advice. We go to great lengths to help users better understand their pets; however, the content on this blog is not a substitute for veterinary guidance.