Crown proudly introduced him as his older brother, Sour Dough. Apparently the stud wanted in on the family's business and, quite frankly, the Apples were always good with extra hands and beefy muscles around the place.
Quite strange though, Sour Dough seemed less than enthusiastic to work with them at first. However, Graham Smith was more than happy to personally take the stallion under his wing and teach him the "ropes" of being a proper work horse. Dough's attitude quickly changed after that.