7. Cancer 

Unfortunately, this particular disease affects your cutie as well! It’s actually estimated that one in three dogs will develop cancer, and mostly pure breeds are at a higher risk. Breast cancer and malignant lymphoma are two of the most common types of cancer.

Usually, senior dogs are the most affected. Unfortunately, symptoms of the early stages of this disease are pretty hard to detect. Weight loss and sores that don’t heal as easily as they did before are two of the most common.

Remember: If you go to the vet in the early stages of the disease, it might save your pet!