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Dairy Digest

Edited by Dr. Jud Heinrichs, Professor of Dairy and Animal Science, Dairy Digest features articles by Penn State's experts in dairy management, engineering, herd health, and related areas. Dairy Digest has been published by the Department of Dairy and Animal Science and Penn State Cooperative Extension since 1963.

June 11, 2008

There are conflicting reports on the contribution of ruminants to greenhouse gas emissions (GGE). In these environmentally sensitive times it will help to put things in prospective.

Polled Holstein Polled (naturally hornless) cattle make up only a small portion of the millions of dairy cows in the United States.
April 21, 2008

Dr. Larry W. Specht, professor emeritus of dairy science, Penn State University, has compiled a history of polled Holsteins, naturally hornless cattle.

April 5, 2008

Your strategy should always be to optimize the use of energy to increase profitability and net cash flow.

April 4, 2008

Every dairy operation has its unique set of challenges; however there are a few management and nutrition options that can help maintain profit.

April 3, 2008

A properly designed and built tie stall barn can provide a comfortable and productive living and working environment for milking cows and their caretakers. There are several new resources available for those who are planning new or remodeled tie stall dairy barns.

April 2, 2008

There is little doubt that a major shift in the cost of producing milk has taken place and may continue for some time to come. Monitoring the COP for your dairy operation has always been important, but is even more so now.

February 5, 2008

Dr. Alex Hristov, Associate Professor of Dairy Nutrition, and Dr. Joy Pate, Professor of Reproductive Physiology and the C. Lee Rumberger and Family Endowed Chair in Agricultural Sciences

February 3, 2008

The USDA’s National Animal Health Monitoring System (NAHMS) recently published part one of the results of the Dairy 2007 national survey. This periodic snapshot of current management practices provides insight into current trends and changes over time.

February 2, 2008

This is the second in a series that will explore the use as well as discuss some of the controversies concerning antibiotic therapy in dairy cattle.

February 1, 2008

In light of the recent tragic death of a Pennsylvania dairy producer by a herd bull I feel it is important to review once again the costs and risks of having a bull on the premises.

December 5, 2007

Depending on which utility company provides your electricity, your rate cap protection may have already expired.

December 4, 2007

Within a certain range of temperatures called the thermoneutral zone or TNZ, calves can maintain body temperature without needing extra energy.

December 2, 2007

Cows with shorter days dry have longer lifetime days in milk.

December 1, 2007

While controversy continues as to the exact role of antibiotic use in animals and linkage to increased resistant populations of bacteria, many producers and veterinarians feel antibiotics do not work as well as they did years ago.

November 20, 2007

Significant changes have come to minimum wage laws. To understand how farmers are affected we must begin with laws that affect all employers.

November 19, 2007

All the information presented in this article is directed to dairy farmers who are classified as “commercial” or “industrial” customers of electricity. If you are classified as a “residential” customer, this article does not apply to you because your price for electricity is based on a flat (or nearly flat) rate of x cents per kWh (kilowatt-hour).

August 30, 2007

The key performance indicator for reproductive performance is 21-day Pregnancy Rate (PR).

August 27, 2007

Based on a large data set of first services (16,587), J.M. DeJarnette and coworkers at Select Sires, Inc. compared the reproductive performance of Holstein heifers inseminated with sex-sorted semen (SS) vs. conventional non-sorted semen (CS).