Addressing the heritability issue is a research objective with this project. Developing heifers Scans. Scan developing heifers when they are 320-440 days of age. All heifers within a contemporary group are to be scanned on the same day or within no more than two consecutive days. Many breeders will scan their yearling heifers at the same time other prebreeding examinations are being conducted.
Weights are to be taken in the morning prior to any feeding of the heifers.
The heifers should not have access to feed overnight prior to weight collection. It's preferred, but not required, to hold the heifers off both feed and water overnight. This weight is to be used in the prediction of empty-body weight, so gut fill must be minimized. Each heifer contemporary group must have two sires represented. One of the sires must be a reference sire used in the Angus structured sire evaluation program for carcass merit.