Breeders will receive the ultrasound measurements as a part of the AHIR system. Ultrasound measures will be adjusted to 365 days for yearling bulls. Scan yearling bulls when they are 320-440 days of age. All bulls 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 bulls at the same time other yearling traits are being measured.
Weights are to be taken in the morning prior to any feeding of the bulls.
Bulls should not have access to feed overnight prior to weight collection. It's preferred, but not required, to hold the bulls 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. In addition, this propensity will best be expressed in the bull at or near the end of a postweaning gain test. Do not scan bulls after they have been taken off a gain test.