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Home » Authors » David Erf
David Erf

David Erf

Geneticist / U.S. Dairy Technical Service / Zoetis
Email David Erf
Articles

ARTICLES

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How genomic testing can help lower somatic cell count and increase profit

Genetics can influence milk quality, but animal husbandry can really drive productivity in the parlor.
September 13, 2024
David Erf and Joel Franks

By pairing management practices with innovations in genomic testing, producers can stock their herds with the right animals that have the potential to be high producers of milk, fat and protein; have less risk for mastitis; require a reduced need for antibiotic use; produce more salable milk; and possess greater potential for improved herd profitability.



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Genomic Testing: How to Generate Returns Quickly

July 31, 2023
David Erf

There is a widespread misconception that dairies must wait to see financial returns from genomic testing — that cash-strapped dairies can’t justify the investment for potential long-term gains. A close look at the numbers produced from a carefully considered genomic testing plan tells a different story — one of increased efficiency and more immediate returns. But how?


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Three reasons genomic testing can help improve calf programs

Healthier, more productive replacement heifers begin in the calf barn. Since many farms do not need to raise every heifer, using genomic testing can help farms identify the calves with the most potential.
March 17, 2023
David Erf and Geof Smith

A dairy producer’s dream and goal is a low-maintenance herd with minimized disease instances, great fertility and longevity. Where can they achieve these results?


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The relationship between a herd’s environment and genetic potential

April 12, 2022
David Erf
As producers implement genomic testing into their management strategy, the tie between a herd’s environment and a herd’s genetic potential can’t be overlooked. Great management programs can result in more valuable and action-oriented genomic information.
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A decade of genomic testing with greater opportunities ahead

June 18, 2020
David Erf
When genomic testing was first introduced to the dairy industry in 2009, there was considerable debate and pushback about the value and reliability of the information. At first, the industry was focused on determining if we could choose bulls without progeny testing – a sea change for the A.I. industry.
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Right-size your herd to lower expenses

April 18, 2019
David Erf
Raising heifers today is about having the right ones, not keeping every one. Do you need an inventory of heifers to maintain your milking herd? Of course. But are you confident your heifer inventory contains the type of females you need to sustain your herd and help you reach your herd’s productivity and profitability goals?
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Genomic testing: How to generate returns quickly

March 19, 2019
David Erf
There is a widespread misconception that dairies must wait to see financial returns from genomic testing – that cash-strapped dairies can’t justify the investment for potential long-term gains. A close look at the numbers produced from a carefully considered genomic testing plan tells a different story – one of increased efficiency and more immediate returns. But how?
Read More

Avoid heifer hoarding: Busting three heifer-raising myths

November 6, 2018
David Erf
While working alongside dairy producers, I hear a lot of myths about raising heifers. Producers often end up “hoarding” their heifers, even though the investment required to raise every heifer is draining their bank account.
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