1. Cow Herd Performance Testing

2. Introduction Help evaluate economically important traits Calving ease Birth weight Weaning weight Calving interval Calf weight:dam weight MPPA Cull cows, select replacement heifers

3. Records Needed Contemporary groups Managed together Maximum 90 d calving window Individual animal identification Birth weight (optional) and date Weaning weight Measured at 160 to 250 days of age Cow birth date (or estimated age by teeth examination) Hip height of cows and calves Body condition of cows at weaning

4. Example Analysis – Heifer Calves IDWeaning Age (d) Actual Weight (lb) 205d Adjusted Weight (lb) Adjusted Weight Ratio Frame Score Muscle Score 1001226494455985.51 1003222436421916.52 100420547549310651 100718444049010561 Average2094614651005.751 HEIFER PERFORMANCE AT WEANING

5. Example Analysis - Cows Cow IDAge (yr)WeightBCSFrameMPPACalf wt/Cow wt 60666143566.511347 6044612246.559338 808849384.549859 7032511466.5510549 Avg511866510248 COW PERFORMANCE AT WEANING