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.

Cancer is the leading cause of death in dogs. But there’s a vaccine being tested that could change that, and some of the ...

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, ...

The behavior came as a surprise to Bortner, who said the dog had never behaved that way before. "I was like, oh my gosh, he’s ...