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 ...

Editor’s note: Dr. Lee Pickett has retired, but Creators continues to distribute columns from her archive. This one is from 2022. Q: I recently adopted Missy, my mother’s middle-aged, mixed-breed dog.