Cancer in dogs: 12 signs that should alert you

Cancer in dogs is particularly the older dogs but also younger. Veterinary medicine has made big strides in recent years in the treatment of cancer in dogs, but as for us humans, it must be detected at the earliest. Therefore, to know and be able to identify physical and behavioral symptoms that can induce cancer in dogs to the veterinarian as soon as possible and put in place adequate treatment. Here are 12 of the most common signs:

The presence of a lump on the body

In the case of certain cancers in the dog, such as that of the skin or udders, the appearance of a lump or a size on the surface of the body can be observed visually or only by touch. It is therefore important, beyond emotional caresses and reward, to caress and massage regularly your dog all over the body to ensure that no size has appeared.

If you discover one, as small as- she, you absolutely must consult your vet. You can not tell if it is a non-serious cyst or a benign (non-cancerous) tumor. As part of a malignant tumor (cancer), cancer can develop very quickly and there is not a moment to lose!

Cancer in dogs: 12 signs that should alert you


If your dog seems dejected, it is difficult to make the slightest effort even to go to his bowl to feed and drink; that he limps or that he does not get up to play or go for a walk, there is a reason to worry.

A sudden lethargy, accompanied or not by other signs mentioned in the article, can be the sign of cancer in dogs. Indeed, some cancers affect the nervous system and the muscles but also the bones in the case of a lameness (bone metastases).

Unexplained weight loss

As for us humans, significant weight loss can be a symptom of cancer or other diseases. You must be vigilant if your dog comes to lose weight abnormally.


Cough in dogs can be a consequence of chronic bronchitis or kennel cough, a contagious infection that is not serious if treated in time (at risk of developing pneumonia).

But chronic cough may, unfortunately, be the symptom of lung cancer in dogs that can appear in two types: primary or metastatic, whose tumors may be benign or malignant. You must, therefore, consult your veterinarian in the case of a persistent cough in your dog.

Breathing difficulties

As we have pointed out for the symptom of cough, breathing difficulties in dogs can be a sign of lung cancer.

Obviously, the advanced age of the dog can cause relative breathing difficulties after exercise for example or in hot weather with a pronounced panting, but if your dog has difficulty breathing at rest and without any special effort, this can be a sign of cancer that must be considered imperatively!



Vomiting in dogs can be a sign of many infectious diseases such as canine parvovirus, chronic as diabetes or more simply the consequences of intoxication or excess of food. But unfortunately, it is also the sign of cancer in the dog such as that of the stomach or the intestine. It is vital for your dog to consult your veterinarian if the vomiting is repetitive and closely spaced and/or chronic.


As with vomiting, and although it may not be a sign of cancer in dogs, if diarrhea is repetitive in your dog, consult your veterinarian. Especially if this symptom comes with one of the other cited in the article, including vomiting.

Add Comment