We are use to people cheering on runners at a marathon, not so much a dog. However, Spencer is back on the Boston Marathon trail this year, doing what he does best – being adorable. Spencer is a therapy dog who attends Boston's famous race every year, sitting on the sidelines with his owner, Rich Powers. Spencer is there for one reason: to encourage runners and give them something cute to look at during the grueling race. Read more about this cute inspirational pooch here.