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The PupJoy Post

10 Warning Signs of Cancer in Dogs

Dogs and people share the battle against cancer. But for our pups, it can be challenging for them to communicate their illness and even harder for us to recognize when there is something wrong. Understanding some of the common warning signs of canine cancer and getting them to the vet quickly, can make a significant difference in their prognosis.

Here are some early warning signs of cancer to monitor. If you notice these signs in your dog, bring them to the vet as soon as possible for a more thorough exam and testing.

1. Bleeding or discharge from any location on the body (most common are mouth, eyes, nose and bladder)

2. Change in urination or defecation habits— both notable reduction or increase in frequency

3. Sores that do not seem to heal

4. Foul smell emanating from the mouth or body

5. Difficulty chewing or swallowing

6. Loss of energy and unusual resistance to exercise and play

7. Loss of appetite.

8. Weight loss.

9. Swellings or lumps that change in size or color.

10. Lameness or stiffness of limbs.


These warning signs can enable us to keep a watchful eye on our beloved pets so we may catch any illness early. Some of these signs, such as weight loss and bad breath, may be indicative of cancer or other health problems. Regardless, they should always prompt a discussion with your veterinarian.