•April 2025 Sire Summary Recap
• Top 200 daughter-proven bulls - production – April 2025
• Top 200 daughter-proven bulls - type – April 2025
• Genomic Young Sires April 2025
• Top 5 Active Bulls by Trait – April 2025
• Top 5 Genomic Bulls by Trait – April 2025
• Top 200 CPI Heifers – April 2025
• Top 200 CPI Cows – April 2025
• Top 50 Cows for PTAT - April 2025
• Top 50 Heifers for PTAT - April 2025
• Top 25 Polled Heifers - April 2025
• Top 20 Polled Cows - April 2025
• All-Time Class Leaders – Last updated April 2025
• 130% List - 1st Quarter 2025
Guernsey PTI Formula
(Updated April 2025)
(25*(PTAP/21.35))+(25*(PTAF/27.75))+
(9*(DPR/2.84))+(4*(CCR/3.43))+(4*(HCR/2.75))+
(10*(UDC/0.71))+(10*(FLC/0.99))+(6*(PL/2.89))+
(2.4*(PTA Strength/1.2))–(1.6*(PTA Stature/2))+
(3*(LIV/2.63))
UDC and FLC should be rounded to the nearest 10th prior to use in the PTI formula
Udder Composite (UDC)
((.17*(FU/1.3))+(.10*(RH/1.2))+(.10*(RW/1.3))+
(.15*(UC/1))+(.33*(UD/1.4))+(.15*(TP/1.2)))/0.71
Foot & Leg Composite (FLC)
((.36*(RV/0.6))+(.48*(FA/0.7))–(.16*(RL/0.7)))/0.99
To see your cows and heifers on these lists...
Requirements for appearing on genetic lists:
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Active AI: bull must have semen available, recorded as Active with NAAB and be daughter-proven with a minimum amount of daughters on recorded test and classified.
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Genomic young sires: bulls must be genomic tested with a valid Stud Code recorded at NAAB and NOT yet daughter-proven.
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CPI/PTAT Cows: cows must have a calving recorded on DHI within the past 2 years, be purebred or GR, and scored GP-80 or higher.
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CPI/PTAT Heifers: heifers must be under 2 years old and be purebred or GR.
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Production recognition: cows must be purebred, GR, or PR. For Class Leaders, cows must meet a minimum requirement of test days.