There are many reasons for your cat to cough, from minor irritation to serious and life threatening. The most common reasons for cough include:
Bronchitis
The name bronchitis refers to the inflammation of your cat’s bronchial tubes which can be acute or chronic. Acute bronchitis comes on suddenly with a harsh cough that is sometimes uncontrollable, labored breathing, wheezing, panting, breathing rapidly, and intolerance of exercise. Chronic bronchitis comes on slowly with a mild cough that eventually becomes constant and difficult to control, weakness, appetite and weight loss. Some of the causes of bronchitis are:
- Allergy
- Heartworm
- Lung worm
- Fungal infection
- Viral infection
- Bacterial infection
Feline Asthma
Asthma in cats is relatively common and usually due to something your cat is breathing in your home or outside. Some of the most often reported signs include a dry cough, exercise intolerance, panting, labored breathing, and gagging. The most common causes of asthma in cats are:
- Chemicals or pollution
- Allergy to cat litter, mildew, mold, smoke, or pollen
Cats with flat faces such as Ragdolls, Scottish Folds, Himalayans, and Persians are more susceptible to asthma.
Hairball
Almost all cats have coughed up a hairball once in their life, even if you have not witnessed it. You may find a wet pile of hair that looks like vomit somewhere in your house. Of course, it may have dried out by the time you find it. However, a hairball cough is just a short coughing spell ending with one or two piles of wet and slimy cat hair.
Heart Disease
Some types of heart disease can also cause your cat to cough such as mitral valve regurgitation, cardiomyopathy, heart failure, and endocarditis. If your cat has one of these diseases, coughing may be an early sign and can also include other signs like weakness, fluid retention (swollen belly), difficulty breathing, fainting, and exercise intolerance.
Heartworm Disease
Heartworm is a parasite (dirofilaria immitis) that attacks your cat’s heart and can cause lung disease, heart failure, and organ failure, leading to death. The severity of the symptoms depends on the amount of worms that have gotten into your cat’s system. Although this is rare, it is a serious illness that must be considered if you have not treated your cat for heartworm.
Pneumonia
This is a serious bronchial condition where the lungs become filled with fluid, making it difficult for your cat to breathe. This is an emergency because without treatment, the lungs will continue to fill with fluid and your cat will not be able to breathe. Some of the signs besides a wet cough include blue lips and nose, green discharge from the nose, breathing heavily, and gasping for breath.
Upper Respiratory Infection
Upper respiratory infections are a common cause of coughing. Usually, your cat will also be sneezing and breathing hard, with a fever and runny eyes and nose. There are many causes of upper respiratory infection such as chlamydia, mycoplasma, retrovirus, or Bordetella.