More commonly referred to as mammary gland cancer- the veterinary equivalent to breast cancer can be significantly decreased by spaying pets when they're young.
What causes mammary gland cancer is unknown, though hormones are believed to play a role in its development. Signs of cancer include firm nodules in the tissue around the nipples, ulcerated skin, swelling and inflammation as well as discharge in some cases.
Cats are not immune to mammary gland cancer, though statistics of incidence vary depending on the study. Generally speaking, mammary gland cancer occurs less often in cats than in dogs. However, studies show that 80 to 90 percent of the mammary tumors in cats are malignant. The malignancy rate for mammary tumors in dogs is 50 percent.
"Since pets can't do self exams, we will have to do them for them.
Given that women are taught to conduct monthly breast self-examinations,it has been suggested that they check their female pets the same day they check themselves.
Owners might have a hard time differentiating normal "fatty" mammary tissue from true masses. Masses are usually firm, If there's ever any doubt, the owner should have the pet evaluated by the veterinarian."