Q: I recently adopted Missy, my mother's middle-aged, mixed-breed dog. She was never spayed, and she has two small masses in her mammary glands. Are these masses likely to be cancer? If not, should I ...

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, ...