Experienced and professional animal trainer provide their insights in answering this question :
A. Coughing in dogs can be caused by a number of things including allergies, asthma, illness such as Bordetella (kennel cough) or even lung and heart problems.

Allergies and asthma can cause a dog to have a raspy cough, and they may wheeze, sneeze or have running noses or trouble breathing when active or in an area where the allergen is present. Your vet can determine if an allergy or asthma is present and provide medication as needed to help with symptoms.

Bordetella can also cause a deep hacking cough, and is common in dogs that frequent doggy day cares, kennels or dog parks. The causes can be bacterial or viral, and treatment depends on if any secondary symptoms such as fever or dehydration is present. Treatment involves cough suppressants from your vet, or even antibiotics and fluids to treat secondary illnesses. Other illnesses such as heartworm may cause a chronic cough and exercise intolerance and should be looked for if your dog is not already on a heartworm preventive.

Small dogs are also prone to a condition called collapsing tracheas, and Cavaliers are very prone as a breed to heart and lung issues. Collapsing tracheae often cause a gasping or hacking cough when excited or active, and may require treatment if they become problematic. Heart and lung problems such as heart failure or genetic abnormalities can also cause coughing as a sign of the illness. Your vet can perform a complete exam to check the health of the lungs and heart.

How to Identify Common Pet Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced pet care professionals :

Your circadian rhythm causes some of your hormone levels to fall at night. Lower levels of hormones can cause your airways to narrow slightly. These narrowed airways can exacerbate your asthma symptoms, according to the Asthma Society of Canada (ASC).
As muscles relax during sleep, the upper airway narrows and leads to increased resistance in the lungs. This means you are more likely to suffer breathing difficulties and coughing fits during the night. Hormonal changes. During sleep, your body goes through hormonal changes that might make your asthma worse.
Heat and Humidity

Hot, humid air can cause asthma symptoms as well. Humidity helps common allergens like dust mites and mold thrive, aggravating allergic asthma. Air pollution, ozone and pollen also go up when the weather is hot and humid. Particles in the air irritate sensitive airways.

The chances of experiencing asthma symptoms are higher during sleep. Nocturnal wheezing, cough, and trouble breathing are common yet potentially dangerous. Many doctors often underestimate nocturnal asthma or nighttime asthma. Studies show that most deaths related to asthma symptoms such as wheezing happen at night.
Cough-variant asthma is treated in the same way that typical asthma is treated. You may be given an asthma inhaler with albuterol, ipratropium, and/or inhaled steroids (anti-inflammatory agents). You should see a gradual improvement in asthma symptoms over six to eight weeks.
What is an asthma cough sound? Most people with asthma have a dry cough, one that does not produce mucous. This happens when the airways constrict in response to an irritant and is a feature of asthma. As well as the cough there is often a high-pitched wheeze sound that is also caused by the constricted airway.
Best weather for asthma

Some people with asthma experience problems in very cold or hot temperatures, which can increase airway irritation. Mild temperatures and low levels of humidity might decrease the risk of airway irritation.

According to a small study in the American Journal of Respiratory and Critical Care Medicine Trusted Source, a room temperature of 68 to 71°F (20 to 21.6°C) is ideal for people with asthma. This temperature isn`t too hot or cold, so it won`t irritate the airways.
Keeping the home warm is also crucial. The optimum room temperature is around 21 degrees in the living room, around 18 in the bedroom. It is better to make sure the bedroom is nice and warm before going to bed to ensure you stay comfortable throughout the night.
Some of the most common food allergens are gluten (from wheat and cereal products), shellfish, eggs, milk, tree nuts, peanuts, sesame seeds, and soya.
Easing cough

The National Institutes of Health (NIH) lists camphor, eucalyptus oil, and menthol as cough suppressants. A word of caution, though: Vicks VapoRub isn`t recommended if your cough has lots of phlegm or if it`s chronic, such as with asthma or emphysema.

Signs that you may be having an asthma attack include: your symptoms are getting worse (cough, breathlessness, wheezing or tight chest) your reliever inhaler (usually blue) is not helping. you`re too breathless to speak, eat or sleep.
Nonselective beta blockers and nonsteroidal anti-inflammatory drugs (NSAIDs) are two classes of drugs that can make asthma symptoms worse for some people. People with asthma may need to avoid these medications and use alternative options to treat high blood pressure and pain.
Short-acting beta-agonists are the first choice for quick relief of asthma symptoms. They include albuterol (ProAir HFA, Proventil HFA, Ventolin HFA), epinephrine (Asthmanefrin, Primatene Mist), and levalbuterol (Xopenex HFA).
Antihistamines do not work on the core symptoms of asthma, such as chest tightness and shortness of breath. They should not be used in the case of an asthma attack where you are struggling to breathe. A doctor can recommend the best acute treatment for you to have on hand, such as a rescue inhaler.
Asthma often gets worse at night when we`re sleeping. The symptoms of nocturnal asthma include: Chest tightness. Coughing that makes it hard to rest.
Airway and lung damage, also known as airway remodeling, is a long-term process where chronic and uncontrolled inflammation from uncontrolled asthma causes irreversible scarring of the lungs and airways.
Asthma cough reflex and throat clearing are common phenomenons. Usually, they go away on their own. Most people self treat and don`t seek medical attention. However, sometimes these symptoms become chronic, which is defined as coughing or throat clearing that persists for 8 or more weeks.
Asthma—Since dextromethorphan decreases coughing, it makes it difficult to get rid of the mucus that collects in the lungs and airways during asthma.
A bronchitis cough sounds like a rattle with a wheezing or whistling sound. As your condition progresses, you will first have a dry cough that can then progress towards coughing up white mucus.
Finding the best sleep position to sleep with a cough and cold can be hard. Sleeping on your back will contribute towards making your congestion worse, whereas sleeping on your front can restrict your airways. So, with that in mind, make sure to sleep on your side.
Healthy lifestyle choice – According to The World Health Organisation, Spain is one of the healthiest places in the world for people with rheumatism, arthritis, asthma and heart-related problems. Thanks to the perfect dry micro-climate, many expats benefit from a noticeable improvement in their health.
Cold air can trigger asthma symptoms and flare-ups, especially when there`s dryness in cold air. For many people with asthma, it`s the dryness in cold air that can lead to breathing problems. Cold air accompanied by windy conditions can also trigger symptoms.
Cold. A cold environment can also worsen asthma symptoms. Cold air, which is often dry, causes the mucus that naturally coats your airways to quickly evaporate. This makes your airways irritated and narrow.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Q. My C. K. Charles has an asmathic cough. Ok most of the day, but worse in hotter rooms in the evening. What’s wrong?
ANSWER : A. Coughing in dogs can be caused by a number of things including allergies, asthma, illness such as Bordetella (kennel cough) or even lung and heart problems.

Allergies and asthma can cause a dog to have a raspy cough, and they may wheeze, sneeze or have running noses or trouble breathing when active or in an area where the allergen is present. Your vet can determine if an allergy or asthma is present and provide medication as needed to help with symptoms.

Bordetella can also cause a deep hacking cough, and is common in dogs that frequent doggy day cares, kennels or dog parks. The causes can be bacterial or viral, and treatment depends on if any secondary symptoms such as fever or dehydration is present. Treatment involves cough suppressants from your vet, or even antibiotics and fluids to treat secondary illnesses. Other illnesses such as heartworm may cause a chronic cough and exercise intolerance and should be looked for if your dog is not already on a heartworm preventive.

Small dogs are also prone to a condition called collapsing tracheas, and Cavaliers are very prone as a breed to heart and lung issues. Collapsing tracheae often cause a gasping or hacking cough when excited or active, and may require treatment if they become problematic. Heart and lung problems such as heart failure or genetic abnormalities can also cause coughing as a sign of the illness. Your vet can perform a complete exam to check the health of the lungs and heart.

Q. My new puppy is coughing a lot and I think it is Kennel Cough. Could it be?
ANSWER : A. Kennel Cough is similar to the human cold, and it can be caused by three categories of microorganisms.

1. Bordetella Bronchiseptica: A small bacteria which can result in bronchitis and severe cough in dogs.
2. Canine Adenovirus: A serious and contagious virus.
3. Canine Influenza Virus: An extremely contagious virus causing mild to severe respiratory symptoms in dogs.
Kennel Cough has its own course of 1 to 3 weeks and can be managed medically.

Close environments with several dogs can increase the chance of dogs catching the cough. Kennel Cough vaccination is aimed mostly at preventing the Bordetella infection through an inhalant or injection vaccination. Although not 100% effective, it should be recommended in all dogs that spend time around other dogs, even the park is considered one of these social occasions.

Kennels have their own policy with regards to Kennel Cough vaccinations and should always be contacted well ahead to understand and comply with their requirements before the stay of your dog.
If you suspect that your dog has caught Kennel Cough, you should see your veterinarian. Your dog might benefit from certain medications to speed up his recovery. These might include antibiotics, anti-inflammatory drugs, and cough suppressants at your vet’s discretion.

Q. My dog keep hacking like a cough or something in her throat, what can I do?
ANSWER : A. Hacking and coughing can be caused by a number of things ranging from foreign bodies such as twigs stuck in the mouth or throat, to infections or illnesses such as Bordetella or Kennel cough, common in dogs that frequent kennels, dog daycare or dog parks. In older dogs, heart and lung issues can also be indicated by a cough that does not go away.

If you think there may be a foreign object stuck in your dog’s throat, you can sweep a finger gently through the back of the mouth or throat if your dog will let you. If something feels stuck and is not easily moved by the finger, it is best to contact your vet to have the object safely removed. This usually requires sedation so that your dog does not become panicked or move, causing the object to become further stuck or cut the throat.

If your dog is showing other symptoms of illness in addition to the cough such as runny nose or eyes, fever, lethargy or changes in appetite, it may indicate a viral or bacterial illness such as kennel cough. These are usually treated with a cough medication in severe cases, plus rest and treatment of any additional symptoms until the condition improves. In bacterial causes, antibiotics may also be given to help your dog feel better.

If your dog has a constant cough that does not go away, or has had changes in ability to exercise, breathing, or appears to have swelling around the chest or abdomen, in may indicate a lung or heart issue. Your vet can thoroughly examine your dog for any signs of heart or lung problems and can then offer care as needed depending on the cause.

Q. Dog-persistent loud frequent cough 30+days; still has good appetite,doesn’t act sick. Need names of effective cough suppressant & anti-inflammatory
ANSWER : A. I would not recommend use of any cough suppressant until you have an accurate diagnosis as to why your dog is coughing as it could make the condition worse. Coughing is a natural protection to keep the airways clear and healthy. A common reason for persistent coughing are heart disease and this should be investigated as a priority. Honey can be used as a natural antiseptic and soothing barrier for the back of the throat but after more than one month your dog really does need a full health check

Q. My dog has been coughing now for a week mainly when she gets excited or barks she starts to cough. She is well eating showing no signs illness.
ANSWER : A. If she is around a lot of other dogs such as in a kennel, dog park or doggie daycare situation, it is possible she may have contracted kennel cough, a very common upper respiratory disease. It can come in both viral and bacterial forms, however only the viral form is covered by vaccination. The viral form usually just has to run its course while the bacterial form or any secondary complications may require antibiotics.

Coughing can also happen if there is an issue with the throat, lungs or even heart, and may be a symptom of a problem there. You may see other issues such as wheezing, gasping for air, changes in activity level (not as active, tires out more easily) in addition to the coughing. Treatment varies depending on the cause, and additional testing such as blood work or X-rays may be needed.

If the coughing does not resolve after a few days, if it worsens, or if you see other signs of illness, then scheduling a veterinary appointment to look for underlying causes is best.

Q. How do you treat Bordetella?
ANSWER : A. Kennel cough is a term loosely used to describe a complex of infections—both viral and bacterial—that causes inflammation of a dog’s voice box and windpipe. It’s a form of bronchitis and is similar to a chest cold in humans. The incubation period is generally 3- 10 days. Infected dogs shed Bordetella organism for 2-3 months following infection.

Most dogs with kennel cough recover completely within three weeks, though it can take up to six weeks in older dogs or those with other medical conditions. Because serious, ongoing kennel cough infection can lead to pneumonia, be sure to follow up with your veterinarian if your dog doesn’t improve within the expected amount of time. Also, if your dog at any time has symptoms of rapid breathing, not eating, or listlessness, contact your vet right away, as these could be signs of more serious conditions. Although most cases of kennel cough will resolve without treatment, medications may speed recovery or minimize symptoms during the course of infection. These include antibiotics that target Bordetella bacteria and cough medicines.

You may also find that keeping your dog in a well-humidified area and using a harness instead of a collar, especially for dogs that strain against a leash, will minimize the coughing.

Q. My Japanese Chin is coughing its a dry cough
ANSWER : A. A dry hacking cough may indicate an issue with the lungs or throat, and may be due to irritation (such as allergies), illness such as kennel cough, or even functional problems with the respiratory system. It is best to schedule an appointment with your vet who can look into your dog’s throat and may also recommend bloodwork or an X-ray to check for common problems if the coughing does not resolve on its own in a few days or if it worsens. Until you can get to the vet it may be best to restrict activities that lead to coughing (such as too much exercise) as well as to keep her hydrated and eating.

Q. I cannot afford vet care. Can I treat my 13 year old dog for kennel cough with OTC meds?
ANSWER : A. Not really, he/she needs antibiotics. You can try to nebulize her at home or even run the shower on hot with the door closed to create a steam room, then turn off the water and leave him/her in there for 15 minutes to help clear the mucous out and help him/her breath better. Sometimes it will help but many times it does not clear the problem. You really need antibiotics if it is indeed kennel cough. Are you sure it is not a heart issue causing the cough? Especially being he/she is a little older I would suspect a heart issue causing the cough and not kennel cough. You should really seek vet care somehow.