You may be perpetuating deficiencies that grew out of the 1970s belief that cows needed to set higher “peaks” in order to eat more corn and oilseeds, less hay, and linear traits that favored “angularity” over healthy body condition.
Young cows milked more like mature cows, but fewer maturing cows become that competitive matured cow (only a third of all cows completing a full third or later lactation). This is built into the current “Genomic” theory.
These genetic pathways lowered butterfat% and eventually protein%, which now are the driving forces that add up to your milk checks. They allowed “negative” milk component traits (such as A1 Beta Casein and E Kappa casein) to proliferate. They created cows that were increasingly harder to rebreed on natural estrus.
To anticipate what current milk market trends mean in future dairy profitability, it is past time to take a hard look at how you select AI sire genetics.
Mich Livestock Service, Inc ph (989 )834-2661 “The alternative genetic view” since 1952
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