Heartworm disease is serious and potentially life-threatening—yet many pet owners don’t realize just how dangerous it can be. It can cause severe damage to a dog’s heart, lungs, and other vital organs; and if left untreated it’s often fatal. We've recently witnessed the devastating effects of heartworm firsthand through the story of two littermates who came into our care. After their owner passed away, these two dogs spent over a month living alone in a field while we worked with the community t