For many people, their pets are like family. No matter how often we leave them behind to go to work or accidentally step on their tails, our pets are still there to shower us with unconditional love. Unfortunately, there are certain pet owners out there that don’t deserve this type of loyalty. Here, one dog died of a broken heart after she was left behind at an airport by her owners. After a month of searching, the devastated dog gave up and died from depression.