My first dog came from a breeder to us when he was just a puppy. I was in third grade so we were both young together. I remember stepping off of the bus and seeing him curled up in my mom's arms. His breed, a Cavalier King Charles, is a highly sought after dog for their small size and beautiful markings. However, dog breeding can lead to medical complications down the line. Heart murmurs are very frequent as cavaliers get older. When he turned 9 years old, they were already detecting the beginning of a heart murmur in him. But my second dog didn't come to us in quite the same way.