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, ...

So far, the vaccine has been given to 600 dogs at 11 clinics across the U.S., including two in Washington state.