Each spring matches between stallions and the farm's broodmares captures the full attention of many horse breeders. Fabulous magazine layouts, production and performance records, and horse show buzz tout the reputation and pedigree of current and past champions.

Watchman looks at genetic potential in three places: the sire line, the sire's dam line, and the mare's dam line. The Y chromosome always comes from the sire; the X chromosome(s) comes from the sire's dam and/or the dam depending on the sex of the foal.