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Discover the essentials of herd performance testing to evaluate economically important traits such as calving ease, birth weight, weaning weight, and calving interval. This guide emphasizes the importance of individual animal identification and manages records effectively, including data on cow and calf weights, hip heights, and body condition at weaning. Learn how to form contemporary groups and analyze performance data for both heifer and cow calves to optimize herd management and enhance selection processes for replacement heifers and cull cows.
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Introduction • Help evaluate economically important traits • Calving ease • Birth weight • Weaning weight • Calving interval • Calf weight:dam weight • MPPA • Cull cows, select replacement heifers
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
Example Analysis – Heifer Calves HEIFER PERFORMANCE AT WEANING
Example Analysis - Cows COW PERFORMANCE AT WEANING
