Bull buying season
You can tell it’s that time of year, to buy a bull, when your mailbox is filled up with sale catalogs. For decades, we have been collecting performance data on bulls, but in earlier times it was mostly individual performance under feedlot conditions. A large breakthrough came when computers became available and statistical methods were developed to calculate Expected Progeny Differences. EPDs provide an estimate of the genetic potential of an animal as a parent based upon three sources of information: ancestors, the animal’s own record and the record of its progeny.