Tumors develop when cells in the body grow uncontrollably. Finding a tumor on your dog can be very frightening, but they are not always detrimental — some are benign, while others are malignant.

As a dog owner, if you notice a lump on your female dog’s mammary gland, caution is advised. It could be a mammary tumor, which can be either benign or malignant. Early detection and treatment are, ...