Official CDCB Evaluations

The Council on Dairy Cattle Breeding (CDCB) releases Official Genetic Evaluations three times per year in April, August, and December.  In order to receive a production or linear evaluation, a sire must have 10 milking, classified daughters. It is extremely important to make sure your cows are identified correctly on the DHI testing sheet, as incorrect identification will prevent them from being included in a sire’s proof. All animals registered or grade having sire ID are included in evaluations.

> Check CDCB for the most current evaluation information

Progressive Performance Ranking (PPR) has been revised effective Dec 2020. 
Weights include:  Protein, Fat, Productive Life, Udder Composite, Mobility, Daughter Pregnancy Rate, Livability, and Somatic Cell Score.
 

NM$ (Net Merit): Previously, sires and cows were ranked by NM$, which included Calving Ability (CA$), Daughter Pregnancy Rate (DPR), Body Size/Weight Composite (BSC/BWC), Feet and Leg Composite (FLC), Udder Composite (UDC), Productive Life (PL), Somatic Cell Score (SCS), Fat and Protein.
NM$ ranking weights were revised in December 2014, April 2017, August 2018, August 2020, and August 2021, and now also include Cow Conception Rate (CCR), Heifer Conception Rate (HCR), Milk, Livability, Health Trait $, Heifer Livability, Feed Saved (Residual Feed Intake and BWC), and Early First Calving.

August 2020, the Calving Ability Index (CA$) formulae were revised for Brown Swiss and Holstein:
Brown Swiss:  -6 * (SCE - 3.0) - 8 * (DCE - 2.8)
Holstein:  -4 * (SCE - 2.2) -3 * (DCE - 2.7) -4 * (SSB - 5.7) --8 * (DSB - 6.6)
Also, the standard deviation for CA$ changed from 10 to 8 for Brown Swiss and from 18 to 14 for Holstein.