Experienced and professional animal trainer provide their insights in answering this question :
A. Similar to these in human lung cancer. For a long time there can be no signs, in more advanced cases cough, exercise intolerence, difficulties with breathing, loss of apetite etc.

How to Identify Common Pet Problems ?

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

The most common symptoms of lung cancer are: A cough that does not go away or gets worse. Coughing up blood or rust-colored sputum (spit or phlegm) Chest pain that is often worse with deep breathing, coughing, or laughing.
Bronchogenic adenocarcinoma is the most common primary lung tumor, making up 75% of cases1. Dogs can also develop squamous cell carcinoma or sarcomas in their lungs as well. As primary lung tumors are typically slow growing, they can become quite large before they are finally diagnosed.
Pulmonary tumors have a high potential to spread elsewhere in the body. Metastasis within the lung tissue or local lymph nodes in cats and dogs is common. Most dogs will have metastasis to other lobes of the lung or lymph nodes, while some will have additional spread to other parts of the body.
Most early lung cancers don`t have symptoms and are found during a routine screening. When stage 1 lung cancer does cause symptoms, they may include: New cough that persists. Chronic cough that gets worse.
There are usually no signs or symptoms of lung cancer in the early stages. Symptoms develop as the condition progresses. The main symptoms of lung cancer include: a cough that does not go away after 3 weeks.
Lung cancers typically start in the cells lining the bronchi and parts of the lung such as the bronchioles or alveoli. A thin lining layer called the pleura surrounds the lungs. The pleura protects your lungs and helps them slide back and forth against the chest wall as they expand and contract during breathing.
For small, solitary tumors that have not metastasized (spread), the average survival time with surgery alone is 20 months. The average survival is closer to 8 months for dogs with big tumors, and 2 months if there is metastasis.
Is Lung Cancer in Dogs Painful? Lung cancer is painful because it results in discomfort and stress, especially if a dog has chronic coughing, vomiting, labored breathing, or thoracic distension. The decreased oxygen perfusion of the blood also leaves the dog feeling lethargic and depressed.
Prognosis – Life Expectancy

A dog diagnosed and treated for a single primary lung tumor that has not spread to the lymph nodes has an average survival time of about 12 months, however, if the dog`s lymph nodes also show signs of cancer or if multiple tumors are found life expectancy is only about 2 months.

Pulmonary adenocarcinoma spreads rapidly to other parts of the body, such as lymph nodes, bones, heart, liver, spleen, and brain. If the disease is not found and treated before it has spread to the lymph nodes, the prognosis is not good.
Even dogs with lung cancer or lung tumors can often tolerate a modest amount of exercise. Signs that your dog has had enough are (1) excessive panting, coughing, gagging, or difficulty breathing (2) pulling the leash to steer you home, (3) walking at a much slower than normal pace, and (4) reluctance to keep moving.
Because stage 0 NSCLC is limited to the lining layer of the airways and has not invaded deeper into the lung tissue or other areas, it is usually curable by surgery alone. No chemotherapy or radiation therapy is needed.
It takes around 8 years for a squamous cell carcinoma, for example, to reach a size of 30 mm when it is most commonly diagnosed so, by the time symptoms arise, the risk of metastasis is considerable. Once symptoms appear they are often ignored by patients, delaying the diagnosis and treatment even further.
Early lung cancer does not alert obvious physical changes. Moreover, patients can live with lung cancer for many years before they show any signs or symptoms. For example, it takes around eight years for a type of lung cancer known as squamous cell carcinoma to reach a size of 30 mm when it is most commonly diagnosed.
Most lung tumours appear on X-rays as a white-grey mass. However, chest X-rays cannot give a definitive diagnosis because they often cannot distinguish between cancer and other conditions, such as a lung abscess (a collection of pus that forms in the lungs).
People often expect a lung cancer cough to be quite a severe cough, but there isn`t any particular type of cough which is more linked to lung cancer. People can have very chesty coughs, or they can have very subtle tickly coughs, like a constant clearing of your throat.
There is no one answer to how long someone can have cancer without knowing. It depends on various factors, including the type of cancer, its growth rate, individual health conditions, and screening practices.
A cough is among the most common symptoms of lung cancer. But many people with lung cancer never develop a cough, and symptoms often don`t appear in the early stages. Research suggests that you become more likely to develop a cough the further your cancer progresses.
The only current option for an at-home lung cancer screening test is a multicancer early detection (MCED) test . As the name suggests, MCEDs, such as the Galleri test, can screen for multiple cancers at once.
Blood tests are not used to diagnose lung cancer, but they can help to get a sense of a person`s overall health. For example, they can be used to help determine if a person is healthy enough to have surgery. A complete blood count (CBC) looks at whether your blood has normal numbers of different types of blood cells.
A complete blood count (CBC) is a common medical test that your doctor may recommend to monitor your health. In cancer care, this blood test can be used to help diagnose a cancer or monitor how cancer or its treatment is affecting your body. For example, people undergoing chemotherapy often receive regular CBCs.
The most common signs in dogs include coughing, weight loss, lethargy, and labored breathing. Other signs include poor appetite, reduced exercise tolerance, rapid breathing, wheezing, vomiting or regurgitation, fever, and lameness. However, 25% of dogs show no signs related to the tumor.
The most important factor in deciding when to euthanize a dog with cancer will be deciding if they have a good quality of life. A good quality of life is unique to each dog and their lifestyle, so your veterinarian`s assessments, along with your own, are essential when discussing changes in behavior or medical health.
Signs of Pain in Dogs with Cancer

It may sound vague, however if your dog begins displaying any behavior that is not typical for them, it could be an indication of pain. Some of the most common signs of pain in dogs include: Limping. Loss of appetite.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Q. Lung cancer, symptoms consist of?
ANSWER : A. Similar to these in human lung cancer. For a long time there can be no signs, in more advanced cases cough, exercise intolerence, difficulties with breathing, loss of apetite etc.

Q. Hi my dog breast is swollen what i do
ANSWER : A. If your pet is not spayed or was spayed after 1-2 years of age there is a chance that this swelling could be mammary cancer. Mammary cancer in pets is common and the chances of cancer are decreased an the risk of getting cancer is only 0.5% if spayed before the 1st heat cycle, 8% if spayed before the 2nd heat cycle, 26% if spayed by the 3rd heat cycle. After the 3rd heat cycle spaying a pet will not decreased chances of mammary cancer.
I would highly advise that you take your pet tot he vet to have this area examined. Typically mammary cancer lumps are firm and can be on multiple breasts.
Without seeing the lump myself, another possibility here is a lipoma (soft fatty tumor) or an abscess.

Q. Hello, my dog was just diagnosed with throat cancer. It has come up & spread to the lungs in the space of 2.5 months. Is there anything ican do?
ANSWER : A. Unfortunately there isn’t much that can be done once the cancer has spread to the lung, it is a terminal cancer and it is just a matter of time as some cancers advance faster than others.

Sometimes steroids can help a little, but once your dog starts having severe difficulty breathing – it is advises to strongly consider euthanasia.

I’m very sorry to hear about your dog’s condition, it is not an easy situation.

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 4 year long haired cat has fluid in lungs has water tablets, refusing wet food sleeping most. Any further I can do?
ANSWER : A. You need to take her back to the vet, the medications might not be enough. has she been diagnose with heart failure or heartworm or only water in the lungs? water in the lungs is cause by some other primary condition like cancer, heart failure or a severe infection – these needs to be treated as well together with the water in the lungs. treating the water in the lungs only is not going to solve the problem.

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. Jenny has inoperable adrenal gland tumor plus bladder cancer .on vetoryl previcox..life expectancy?
ANSWER : A. Life expectancy varies greatly depending on how advanced the cancer already is, and how severe symptoms are. Treatment can help slow progress and improve symptoms, thus improving quality of life and lifespan. Average life expectancy with these type of cancers is anywhere from a few months to up to 1-2 years depending on severity, however monitoring your dog’s quality of life is the best determination.

Q. Cancerous tumor in her toe needs to be amputated will she live
ANSWER : A. Of course the type of cancer is very important to help evaluate survival time, and progression of disease. I would be happy to consult with you in more detail. If your veterinarian is proceeding with amputation, I would assume that no metastatic disease has been observed. ( cancer that has spread to other organs such as the lungs or liver). In many cases amputation can be curative, but again, it depends on the type and stage of your dogs cancer. Dogs recover amazingly well from digit, and even whole limb amputations, so that would be the least of my concern. Post amputation management such as chemotherapy would be my next consideration, and again would be based on diagnosis, stage, and metastatic progression.