Quiz Result: My Dog (Less Than 8 Years Old) Has a Wet Cough, and Does Not Appear to be Well

This article was updated on September 13th, 2022

Your situation:
✓ Your dog is less than 8 years old
✓ Your dog has a wet cough (coughing up phlegm or mucus)
✓ Your dog does not appear to feel well (For example, lethargy or loss of appetite)
(If this is NOT your situation, click here)

There are many different types of coughs. A cough that sounds “wet” or results in the production of mucus and phlegm, which is coughed up, is often termed a “productive” cough. A wet cough combined with a dog that isn’t feeling well is a cause for immediate concern.

Signs of not feeling well that you need to watch for include:

• Not eating well
• Lethargy (lack of energy)
• Any difficulty breathing

If your dog is coughing up phlegm or mucus and any of these above signs are also seen, please take your dog to their veterinarian as soon as possible. Wet coughs in dogs that are not feeling well may be caused by pneumonia, heart disease, or cancer, so it’s important to work with your veterinarian on a treatment plan.

Most Likely Causes for a Wet Cough in a Young Dog (< 8 Years Old) Not Feeling Well

Much information can be learned by evaluating a dog’s cough and the dog’s overall health. The most common causes of a wet cough in a dog that is also exhibiting signs of illness are:

1. Pneumonia

What it looks like:

✓ Dry or wet coughing
✓ Not feeling well and often ill
✓ Fever (read: how to tell if your dog has a fever)

Pneumonia occurs when there is fluid in the lungs. Pneumonia may result from a contagious infection caused by a virus or bacteria, cancer, heart disease, aspiration, or a fungal infection. It is essential to decipher what is causing the pneumonia so it may be successfully treated. Typically, this will include chest x-rays, blood work, and possibly using endoscopy to obtain lung fluid and tissue samples for evaluation.

This is an example of dry coughing due to Pneumonia:

All of the conditions that cause pneumonia are serious and require prompt medical care. Treatment will depend on the cause and the severity, and costs will also vary widely. If your dog has any difficulty breathing, this is an absolute emergency, and you must take them to the nearest veterinarian right away.

2. Heart Disease

What it looks like:

✓ Dry or wet coughing
✓ Coughing after getting up
✓ Difficulty breathing / gasping
✓ Getting tired quickly or not feeling well

The most common type of heart disease we see in dogs is dilated cardiomyopathy. This heart condition results in a “stretched out,” flabby heart that loses the ability to contract properly. This leads to sluggish blood flow and fluid buildup in the lungs and abdomen.

Dogs with heart disease often cough first thing in the morning or after getting up from lying down. This is due to the fluid pooling in the lungs. It can be difficult to ascertain if the cough is “dry” or “wet” from simply hearing the dog cough. Poor oxygenation and difficulty breathing may lead to the dog not feeling well. At this point, the dog is in congestive heart failure, and it is an emergency. Other clinical signs include gasping, increased respiratory effort, tiring easily, and difficulty getting comfortable when lying down.

This is an example of what coughing due to heart disease sounds like:

Treatments are available to help ease congestive heart failure; however, the disease cannot be cured. Depending on the severity of the condition when diagnosed, costs may range from a few hundred dollars to thousands. However, the earlier it is diagnosed and treatment is started, the better the prognosis and the longer the dog may live.

3. Cancer

Sadly, cancer is very common in dogs. A wet cough in an also sick dog may indicate a primary lung cancer or the presence of metastasis from a cancer located elsewhere in the body that has spread to the lungs. Typical early clinical signs may be only slightly increased respiratory effort or rate and a cough.

Depending on the situation, treatment may be possible, but the prognosis for these pups is usually poor. If your dog is diagnosed with cancer, you may want to work with a veterinary oncologist to formulate a treatment plan.

Disclaimer: Other medical conditions causing dogs to cough include cancer, endocrine disease, autoimmune disease, foreign material in the throat, and others. It is important to meet with your veterinarian to perform a full medical exam and ensure correct diagnosis and treatment.

8 Best Home Remedies To Help Your Coughing Dog

Our veterinarian Dr. Debra Eldredge – author of the best-selling book “Dog Owner’s Home Veterinary Handbook” – has compiled for us a list of the most effective home remedies to help coughing dogs:

1. Start with Simple Home Care: If your dog has discharge from his eyes or his nose, use a warm compress to soften the crusts and clean gently. A dab of vitamin E (puncture a capsule with a pin and squeeze out a drop) can help with a sore nose. Artificial tears drops or ointment can be safely applied to his eyes.

2. Use a Humidifier or Steam: Excessively dry air can cause coughing in dogs. If you have a humidifier, encourage your dog to rest in that area. 

3. Use a Teaspoon of Honey: People also often reach for honey when they have a cough. A teaspoon of honey in a cup of warm water may ease a short throat. This is not recommended for puppies (think about infant cautions) or for dogs with diabetes as it can interfere with glucose regulation.

4. Consider Limiting Physical Activity in Cold Weather: Very cold, dry air outside can stimulate coughing as well as dry air inside. Senior dogs don’t handle extreme cold well. Keep walks short and limited. 

5. Use a Non-Restrictive Harness Instead of a Collar: Be sure that you use a non-restrictive harness for walks. Do not walk your dog on a collar. The pressure on the trachea can stimulate more coughing.

6. Give your Dog a Quiet Place to Rest: Coughing can be exhausting. Make sure your dog has a quiet place to rest, away from active children or other pets.

7. Increase Hydration: It is important to support your dog’s hydration when he has a cough: coughing can increase his normal hydration needs. If your dog is not drinking enough water, consider trying homemade chicken soup, low or no sodium bouillon, or adding some juice from tuna canned in water or other meat juice flavoring (plain) to his water.

8. Over the Counter Cough Medication: Dextromethorphan is a common ingredient in human OTC cough medications such as Robitussin. It can be helpful for some dogs short term. This is an “off label” medication so you should check with your veterinarian about use in your individual dog. It is not recommended for dogs with liver problems or for dogs on a number of medications.

Continue reading: 8 Best Home Remedies to Help a Coughing Dog (Vet Advice).

Important: the home remedies mentioned here are only supportive ideas to help your dog with symptoms – they are not likely to help with the root cause. A visit to your veterinarian is important to help understand the root cause and define an effective treatment plan.

When Is Coughing Serious Enough to See Your Vet?

You might be wondering if your dog’s cough or gagging is serious enough to justify a visit to your veterinarian. It can be hard to know as an owner when a cough is serious enough to warrant veterinary attention.

A dog may occasionally cough to clear their throat or if something irritates them. That’s usually not a cause for concern. However veterinary attention is likely required if a cough:

• becomes persistent,
• lasts more than 2 days, or
• becomes more frequent or severe

Additionally, a cough is always serious if it comes with breathing difficulties, if your dog is generally unwell in themselves or if they are coughing up large amounts of phlegm or blood.

As a general rule, it may be ok to just monitor your dog’s cough at home, if your dog is still:

• bright in themselves and
• eating and drinking as normal

Since coughing can be a symptom of a serious ailment, it’s important to be cautious and take your dog to the veterinarian if you are unsure about what to do.

What Will the Vet Ask You

It’s important to be prepared for the basic questions your vet will want to ask about your old dog’s coughing or gagging. Being able to answer your vet’s questions will help improve diagnosis and ultimately solve the issue faster for your canine friend. Questions may include:

• How can you describe the cough? (choking, gagging, retching, gasping or throat clearing noise, etc?) – it may not even be a cough at all!
• Is the cough productive – i.e. does your dog bring anything up when they cough?
• Are there any other signs associated with the cough such as breathing issues or lack of appetite
• How frequent is the cough? Is coughing on a daily basis, several times per day?
• How long has coughing been going on?
• Does the cough appear to come more from the throat or chest?
• Does anything trigger the cough? Or does it happen in a specific environment?

How Will Your Vet Diagnose the Issue?

Your vet will start by taking a thorough history (see how to prepare for the visit below) and by performing a physical examination on your dog. They will pay particular attention to any abnormal heart or breathing sounds, the heart rate and rhythm and your dogs temperature. By using all of this information, they will then decide the best next course of action.

Sometimes your vet may opt to start a trial treatment plan and base the diagnosis on the response to medication. For example, in the case of kennel cough, anti-inflammatory medication is often all that is required and if your dog responds well then it’s likely that kennel cough was the cause.

However, if a heart murmur or abnormal heart rhythm is detected then a heart ultrasound scan and X-rays might be the next step. This will help evaluate whether or not your dog’s heart has signs of congestive heart failure such as thickening of the heart walls, inefficient heart valves or fluid build up within the lungs.

X-rays are a key tool in evaluating any dog that has developed a persistent cough. By taking an X-ray of your dogs chest and lungs, vets will be able to visualise the distribution of air within the lungs. A healthy dogs lungs should appear dark on an X-ray as they are full of air; the presence of any lighter coloured areas may indicate thickening within the lungs or even fluid build up. There are many different ‘lung patterns’ that can be identified on an X-ray that can point towards a specific diagnosis.

Related article: How to help your coughing dog at home: