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Coughing in Dogs

Understanding and Managing Coughing in Dogs


1. Introduction

Introduction It is not uncommon for pet owners to observe their dogs coughing. It is a sign that is recognized on a regular basis, and most people view it with varying degrees of anxiety, mostly for the dog’s sake. For many, a cough is an unremarkable inconvenience, like sneezing. However, it can be a sign of a plethora of underlying health issues and should be taken seriously. When it is not, pets can suffer unnecessary discomfort and potentially severe complications. There is no consensus in veterinary medicine regarding what constitutes an alarming cough or what severity might be deemed so. Thus, a dog’s caretaker may not know when to bring a coughing pet to the veterinarian, creating a “better safe than sorry” scenario of increased veterinary caseload for seemingly trivial complaints. This approach to animal healthcare, addressing minor discomfort, can lead to increased waiting room times and overcrowding, increasing public health risk and impeding appropriate access to medical treatment for legitimate concerns. There is some general consensus among veterinarians about the discovery of the underlying cause of a cough and how to manage or treat pet owners’ concerns, and educate them about what signs indicate a possible need for further intervention. This essay will cover the many possible causes of cough and how we approach proceeding in our veterinary hospital conducting triage. We will also cover, in simplistic terms, the many ways we can deal with a cough in dogs. We hope to arm pet owners with the ability to move forward in a meaningful way with their pet’s healthcare. The aim of the treatment is to prepare pet owners with an informed plan. Proper acute intervention can lead to a healthier pet and a more productive veterinary visit. This essay serves as a basic plan of how we approach the coughing pet here at your Small Animal Clinic. It will provide direction on what signs and symptoms might elicit immediate attention to emergency health issues, healthcare that equates with urgent care waits in a human population. Some signs that might indicate a severe issue for a coughing dog include fainting, unconsciousness, abdominal effort with breathing, or any change in the respiratory pattern. Subtle changes for any pet can be a sign of undue stress or discomfort and should be addressed at the earliest convenience. At any time, if you have any concerns or questions, never hesitate to reach out to your healthcare provider – that is what we are here for. We hope this essay will help the pet owner address coughing in dogs productively and prevent the crowding of emergency departments.

2. Causes of Coughing in Dogs


Coughing is a frequent complaint in veterinarians' consulting rooms. Often, it can lead to a poor quality of life for the pet and is extremely worrying for the pet owner. The age and breed of the pet, as well as the cough history, often give a big clue as to the possible cause of the cough. While the cough is distressing, it is also a protective reflex and allows the body to expel substances from the airway. Despite being a major clinical sign, coughing has never been precisely defined. There are numerous definitions, but the simplest is "the (usually) repetitive expulsion of air from the lungs through the trachea and mouth." However, the causes of coughing are diverse, and to help provide effective treatment, we need to determine the inciting cause.

Coughing is often termed productive (moist) or non-productive (dry). This is a simple difference of whether mucus or material is being coughed up. Coughing can also be sorted into two basic categories: infectious and non-infectious. Infectious coughs are those caused by viruses or bacteria. Infectious coughs are usually highly contagious and cause inflammation, making the dogs feel ill as well as coughing. Non-infectious causes of coughing are much more numerous. Coughs that are initiated by non-infectious factors can be caused by anything from an allergic reaction to the presence of dust, cigarette smoke, environmental chemicals, or plant pollens. Consequently, non-infectious coughs can be seen very shortly after exposure to the stimulus and even when the dog is feeling very well if, for example, they have undiagnosed heart disease. In broad terms, therefore, coughs can come on quickly (acute) or progress over a longer time period (chronic) in response to a variety of causes.

2.1. Infectious Causes

Kennel cough is also called infectious tracheobronchitis and is a common reason for coughing in a variety of dog populations, especially when large groups of dogs exist together. Areas where dogs are commonly housed include boarding kennels, groomers, dog shows or training classes, humane shelters, pet stores, and at home. Two major pathogens seem to be to blame. Canine adenovirus type 2 is less common but more dangerous to the dog’s overall health because it can cause hepatitis. Transmission between dogs occurs by direct contact with infected dogs, either by the virus particles being spread in the air by coughing dogs or by an infected dog touching its nose to an unsuspecting potential host’s nose. The initial clinical signs characterizing canine influenza are similar to kennel cough, with coughing, nasal discharge, and fever. Almost all dogs that come in contact with the virus will become infected. Most of the affected dogs have only mild illnesses characterized by a cough and nasal discharge. Infrequently, the disease progresses to pneumonia, especially in dogs with compromised respiratory function, like some of the brachycephalic breeds where head conformation has led to airway compromise. Canine parainfluenza virus has been isolated from dogs with mild respiratory signs and from those with pneumonia, and it is also known to cause death in a small percentage of infected dogs. Canine distemper virus in dogs has been shown to be associated with various respiratory illnesses ranging in severity from mild to severe bronchitis or pneumonia. Pneumonia is also a common complication of canine infectious diseases that suppress the normal protective functions of the tracheobronchial tree. Puppies are more susceptible to bacterial pneumonia than adult dogs because their immune systems are not yet fully formed. Cockers, Westies, Springer Spaniels, and some toy breeds may be more susceptible to bronchitis because of their airway anatomy or chronic exposure to respiratory allergens. Housed in cold, thickly walled rooms, adult dogs can develop signs of bronchitis. In all of these cases, a thorough physical examination, history, and diagnostic testing will assist in determining the underlying cause and deciding on a treatment regimen. Vaccinations are available for some of these infectious causes; contact your veterinarian for preventative care information. It is critical to seek veterinary care promptly if your dog is showing signs of coughing cycles, especially with weakness or chest pain.

2.2. Non-Infectious Causes

Non-infectious causes of coughing

There are many reasons that dogs can develop a cough, not all of which are infectious. Factors like allergens, small particles such as smoke, and pollutants can cause coughing. Sensitive dogs' lower airways are normally very good at clearing these particles out. In certain cases, this might occur with enough force to provoke a cough. Dogs with chronic respiratory, tracheal, or cardiovascular problems such as collapsing trachea, heart disease, and certain disorders of the respiratory system may cough or experience coughing episodes as part of their condition. In the majority of these instances, the coughing episode is a result of bronchial or vessel irritation resulting from an increase in systemic circulation, such as excitement or anxiety. The cough that results is normally self-limiting and resolves soon after the nerve sensation stops. Chronic coughing conditions can get worse and may require conventional medical care by a veterinarian. Coughing can be less frequent, though it can worsen as quickly as it can improve.

Several dogs show a 'backward' kind of cough, and a cough may sometimes be adapted by the dog by making an attempt to “cough up” the contents of their throat before swallowing. Respiratory disease and unusual noises during or after coughing are a sure indication that your dog needs medical attention. Coughs are sometimes treated with completely different means. Chronic coughs can be a symptom of a number of different potential causes which require various care. Since the majority of these cases of coughing are non-infectious in origin, they require different multiphasic treatments when contrasted with infectious coughs. Dog owners should note any other details they can offer to their veterinarian. An irritated or dry cough, like coughing in dusty or pollen-filled air, can be aggravated by dryness. Random coughs do not normally occur in response to inhalation. It can be extremely beneficial to be able to distinguish whether or not a dog can cough from something similar to reverse sneezing. Any of this information can be extremely helpful in negotiating a dog's environment. Preventative health and care visits are strongly recommended for all pets. Examinations of the airways, lungs, respiratory systems, and heart as part of these regular screenings may help to prevent this condition. It is critical to establish the specific cause of coughing, given the numerous potential causes, which vary from less to life-threatening.

3. Diagnosing Coughing in Dogs

Coughing can be caused by a wide variety of problems in dogs. Some coughs are harmless, some are easily treated, and some are life-threatening. In order to treat the cough, the underlying problem needs to be identified and, where possible, treated or managed. To make a diagnosis, the vet often combines tests with a thorough history and examination of the pet. Diagnosis of the cause of a cough starts with a good clinical examination. Tests are simply used to help support or exclude various diseases. Additional tests, such as X-rays, blood tests, bronchoscopy, or a cough assay of the environment, are sometimes performed. Taking a detailed history is very important. This will include questions about where the pet has been – for example, boarding kennels or showing, whether it has been exposed to any animal with a cough, and whether its diet has changed. Raising puppies, the use of a collar and lead, and how the pet is kept are all important too. Most veterinarians will recommend taking X-rays of the chest as this is the single most important test to pinpoint the most likely cause of a cough. Sometimes, vets also recommend taking X-rays of the whole dog in case there are other detectable signs. But what these tests do is give a 'likely' diagnosis. The vet deciphers all the information he or she has collected to decide which condition is the most likely cause of the cough, as the other tests are only supportive. Some conditions will be very clear, but some are difficult to prove unless severe enough to show gross changes in the chest, like bronchitis and early chronic bronchitis. There is no single easy test like the one used in humans, so the diagnosis of a cough in a dog is a process of elimination.

4. Treatment Options for Canine Coughing



Some cases of coughing may require treatment, although therapeutic options will likely depend on the underlying cause of the cough and should be planned for on an individual basis. In general, two categories of treatments might be recommended for coughing dogs: medication or procedures for the specific disease process and/or symptomatic management aimed at clearing secretions, allowing improved airflow, and/or reducing coughing sensitivity. In some cases, no specific treatment might be recommended. In some cases, cough suppressant medications, or "antitussives," might be needed, especially if a dog has had a harsh, non-productive cough. Use of antitussives might be cautioned in some cases of diseases such as canine infectious respiratory disease, as it might make cough and underlying disease last longer or other agents such as mucus dissolvers or bronchodilators might be recommended to optimize comfort.

Sometimes, a dog has a cough as a symptom of an infection that's treatable with antibiotics or antivirals, two medications that are supportive in cases. Although it's not typically logical to treat every dog with antibiotics or antiviral medications just because of a cough, it might be medically appropriate in certain circumstances. Therapy might include medications considered "alternative" or preventative in some cases. In cases of cough caused by a sensitive airway, bronchitis, or asthma, chronic inflammatory disease-modifying medications might be used to minimize or impede airway inflammation. In cases of hospitalizations and chronic bronchopulmonary disease in dogs, bronchodilators to relax the airway smooth muscles might be antiquated. I'd offer more specifics, but the approach that's right for your dog depends heavily on the results of the first diagnostic tests as well as the progression of the cough. Monitoring, discussing with your veterinarian, and following up with applicable testing and treatment will provide you with the most effective and safest approach. You might also try various home remedies and supportive care instead of other treatments for the dog's cough. These services, when combined with the regular care provided by a veterinarian that parallels your pet's treatment, can be beneficial.

4.1. Medication

In contrast, antitussives are primarily used when a dog has a continuous and distressing cough due to other conditions. They act upon the coughing reflex in the brain and aim to suppress uncomplicated coughing, providing some relief to the patient. Expectorants stimulate bronchial secretions and thin bronchial secretions, and mucolytics can reduce mucus viscosity, making mucus easier to clear from the airways by a productive cough. Thus, they have the potential to aid the clearance of lower airway secretions. The antitussive, expectorant, and mucolytic effects of currently available medication options are generally limited and may be dose-dependent. If a veterinarian suspects that a bacterial infection is the reason for a dog’s coughing, he or she may prescribe appropriate antibiotics, along with other specific treatment protocols if necessary.

A wide range of antibiotics is available with various uses, and as such, their appropriateness for a dog’s condition is at the veterinarian’s discretion. Antibiotics are not effective against viruses, fungi, or non-pathogenic mycoplasmas or chlamydiae. Although several antibiotics used for dogs can be purchased over the counter from various retailers, this might not mean that they are always suitable for treating a dog’s condition. Moreover, drug resistance should be considered. It is essential to follow a veterinarian’s advice and use medication as prescribed, paying careful attention to the dose and treatment regimen. Antibiotics can only be used if dogs are diagnosed with bacterial infections by veterinarians. When a dog is suffering from a cough, it is important for pet owners to give prescribed medication, carefully following the instructions of a veterinarian. This will enable the appropriate dosage of medication to enter the body at key times and is necessary for successful treatment. In the case that curative medication does not take effect or when the expected adverse reactions occur, pet owners should see a veterinarian.

4.2. Lifestyle Changes

When management of coughing is necessary, your veterinarian will provide you with targeted treatments to address the underlying cause of the cough, along with any medications or lifestyle changes that will help minimize the frequency or severity of coughing. Early intervention is always the best approach when a dog begins to cough, as that can help a veterinarian identify and manage the cause of the cough before the disease has advanced. Certain lifestyle modifications may also help to ensure that a dog coughs less frequently and less harshly: - Keep your dog indoors when outdoor allergens or irritants are elevated. - Utilize air filters and humidifiers to keep indoor air quality high. - Try to maintain a healthy weight in your dog and exercise him or her regularly to stretch the lungs and airways, and help keep mucus levels optimal. - Help your dog reduce stress by providing a calm and quiet environment and maintaining him or her on an established routine. - Visit your veterinarian regularly for wellness checkups and to ensure that no new medical or physiological issue may have affected your dog. - Feed your dog a balanced and appropriate diet for optimum well-being. Moderate physical exercise to maintain a healthy body weight, breathing exercises for lung condition, and a regular resting and eating plan are also beneficial, particularly for the very anxious dog. A veterinarian should counsel pet owners on the risks and benefits of these and other lifestyle changes in order to increase the benefits of treatment for affected animals.

5. Preventive Measures to Reduce Coughing Risk

Prevention is better than cure! You may not be able to prevent your dog from coming into contact with a coughing dog all the time, but you can at least help them be in the best possible condition to be ready to fight off and resist, where possible, the ins and outs of illness and disease. 1. Regular vaccination against infectious diseases is crucial; always ensure that boosters are given because outbreaks of infectious disease can occur relatively quickly. If the number of unvaccinated dogs rises to a high enough level, the so-called 'herd immunity' is significantly decreased and can lead to an outbreak of disease. If you board your dog, all boarding kennels will require that your dog is fully vaccinated at least two weeks prior to boarding. 2. Maintain a clean environment, e.g., vacuum carpets and wipe down hard flooring, remove dust mites and other allergens that could trigger an allergic response and cause coughing. 3. Regular health checks with your vet to catch any problems early are always a good idea. 4. Dogs learn from other dogs, so keep up with gentle, controlled exposure and playtime with other dogs. Good socialization in a variety of settings and with different dogs over the first year of life should assist your dog in being better able to cope with boarded living. 5. Adjust your dog’s care routines as the seasons change; avoid extremes of heat and humidity, which can make it harder for your dog to breathe properly. 6. Promote a generally healthy dog through a good diet, appropriate exercise, and mental stimulation.

References:

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Ijaz, A., Nabeel, M., Masood, U., Mahmood, T., Hashmi, M.S., Posokhova, I., Rizwan, A. and Imran, A., 2022. Towards using cough for respiratory disease diagnosis by leveraging Artificial Intelligence: A survey. Informatics in Medicine Unlocked, 29, p.100832. sciencedirect.com

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Sundar, K. M., Stark, A., & Morris, M. J., 2024. Laryngeal Dysfunction Manifesting as Chronic Refractory Cough and Dyspnea Laryngeal Physiology in Respiratory Health and Disease. Chest. [HTML]

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