Contact Information

Scott Radcliffe
Department Chair

900 W.P. Garrigus Building Lexington, KY 40546-0215

+1 (859) 257-2686

Darrh Bullock

Darrh Bullock

Darrh Bullock

Darrh Bullock

Professor

Faculty
807 W.P. Garrigus Building Lexington, KY 40546-0215

Last Revised: Sep 11th, 2024

Professional Biography

Significant Activities

University of Kentucky Ag Faculty Council

University of Kentucky Beef Integrated Resource Management Committee, Member

eBEEF.org Team member

National Beef Cattle Evaluation Consortium, Member of Scientific Council and Coordinator of Educational Programs

Beef Improvement Federation, East Region Secretary and Board of Director

International Committee for Animal Recording Beef Group, former U.S. representative

Southern Section American Society of Animal Sciences Extension Committee Chair (past)

Invited Presentations

Invited speaker for meetings and symposia in Alabama, Arkansas, Australia, California, Colorado, Florida, Georgia, Indiana, Iowa, Italy, Mississippi, Missouri, Ohio, New Mexico, New York, Nevada, North Carolina, South Africa, Tennessee, Texas, Virginia, West Virginia and Wyoming

Awards

2018 Fellow Award, American Society of Animal Sciences 

2017 Animal Industry Service Award, American Society of Animal Science

2015 Extension Award, American Society of Animal Science

2010 M. D. Whiteker Award of Excellence in Extension, KASEP

2003 Southern Section Extension Award, American Society of Animal Science

2002 Outstanding Extension Project Award - Association of Kentucky Extension Specialists (Co-recipient)

1996 Outstanding New Extension Specialist - Association of Kentucky Extension Specialists

1996 Outstanding Extension Project Award - Association of Kentucky Extension Specialists (Co-recipient)

1997 Outstanding Educational Material Award - American Agronomy Society (Co-recipient)

Professional Organization Memberships

American Society of Animal Science

Kentucky Cattlemen's Association

Kentucky Association of State Extension Professionals

Gamma Sigma Delta

Current Program Emphasis

Beef Systems Analyzer
Developing an online program based on a logic model to assess aspects of a farms beef operation based on producers’ inputs. Best management practices recommendations will be made to improve the beef operation along with resources to help them make the change.

Beef Cattle Breeding Management
Providing Kentucky’s beef producers with the necessary tools to maximize profits from their operation. The primary focus is to encourage sound crossbreeding programs to take advantage of heterosis and educate producers on the use of Expected Progeny Differences in their selection practices.

Beef Integrated Resource Management (IRM)
Member of the multi-discipline coordinating committee that oversees the statewide IRM program. The effort of the beef IRM coordinating committee is to implement a state-wide educational program based on integrated concepts. The overall goal of the committee is for Specialists, Ag Agents and ultimately producer to apply holistic concepts to management and problem solving, based on predetermined goals.

Beef Quality and Care Assurance
Coordinate the educational videos for the BQCA program. This program encourages the best management practices in the proper treatment of cattle. This is Kentucky’s version of the national BQA program with additional emphasis on handling and care.

Master Cattleman Program
Develop and present educational materials on beef breeding management. This is a four hour course that covers assessment, crossbreeding and selection.

Beef Genetic Improvement Program
Developed a bull selection process for beef producers to qualify for cost-share dollars from the Kentucky Ag Development Fund. The process involves an educational program on matching genetics to management and crossbreeding, the producer identifies the category of bull that best fits their situation and then purchases a bull that meets the Expected Progeny Differences guidelines within that category.

Publications (Since 2012)

Reviewed Extension Publications

Les Anderson, Darrh Bullock, Ben Crites, Kevin Laurent, Jeff Lehmkuhler, Katherine VanValin.  2024.  ASC-263 Converting from Year-round to Controlled Calving

Les Anderson, Darrh Bullock, Kevin Laurent, Jeff Lehmkuhler, Katherine VanValin.  2024.  ASC-264 Artificial Insemination in Beef Cattle

Les Anderson, Darrh Bullock, Ted Kalbfleisch, Jeff Lehmkuhler, Mary McCarty.  2024.  ID-273  Match-a-Yak: a Tool to Minimize Inbreeding in North American Yaks

Darrh Bullock.  2023.  ASC-256 Comparison of Production Levels Among U.S. Beef Breeds

Les Anderson, Darrh Bullock, Kevin Laurent, Jeff Lehmkuhler, Katherine VanValin.  2022.  ASC-248 Vitamin Supplementation for Beef Cattle

Darrh Bullock.  2021.  ASC-169 Beef Sire Selection Manual, 2021

Les Anderson, Michelle Arnold, Darrh Bullock, Kenny Burdine, Roy Burris, Ben Crites, Jimmy Henning, Steve Higgins, Steve Isaacs, Kevin Laurent, Jeff Lehmkuhler, Lee Moser, Gregg Rentfrow, Kylie Schmidt, Ray Smith, Chris Teutsch, Lee Townsend, Katherine VanValin, Paul Vijayakumar.  2021.  ID-108: The Kentucky Beef Book, 2021

Glen Aiken, Les Anderson, Darrh Bullock, Roy Burris, Lowell Bush, J.R. Bussard, Andrew Foote, Ben Goff, David Harmon, V.B. Holder, Isabelle Kagan, Nicole Kenney, D.H. Kim, S.E. Kitts, Jim Klotz, Anne Koontz, Jeff Lehmkuhler, Kyle McLeod, Jim Strickland, Eric Vanzant, Bill Witt.  2014.  SR-105: 2012 Beef Research and Extension Report

Jeff Lehmkuhler, Katie VanValin, Kevin Laurent, Darrh Bullock, Les Anderson. Darrell Johnson.  2020.  ID-263 Alternative Protein Sources for Cattle

Jeff Lehmkuher, Katherine VanValin, Les Anderson, Darrh Bullock, Kevin Laurent.  2020.  ASC-244 Feeding Distillery Stillage to Beef Cattle

Jeff Lehmkuhler, Les Anderson, and Darrh Bullock, Animal and Food Sciences; and Michelle Arnold.  2019.  ID-258 Weaning Beef Calves

Bullock, K. D. Simple Inheritance in Beef Cattle. 2017. eBEEF.org (http://articles.extension.org/sites/default/files/25_Simple%20Inheritance%20in%20Beef%20Cattle_Arial.pdf)

Bullock, K. D.. The Genetics of Horned, Polled and Scurred Cattle. 2016. eBEEF.org (http://articles.extension.org/sites/default/files/2015-4_Genetics%20of%20Horned%20Polled%20and%20Scurred%20Cattle_Arial.pdf)

Bullock, K. D., and M. Rolf. Beef Sire Selection Recommendations. 2015. eBEEF.org (http://articles.extension.org/sites/default/files/1_Beef%20Sire%20Selection%20Recommendations%20fact%20sheet_Arial.pdf

Bullock, K. D.. Genetic Practices to Improve Beef Cattle Reproduction. 2015. eBEEF.org (http://articles.extension.org/sites/default/files/4_Genetic%20Practices%20to%20Improve%20Beef%20Cattle%20Reproduction_Arial_0.pdf

K. D. Bullock. Mating Systems in Commercial Beef Cattle Operations. 2015. eBEEF.org (http://articles.extension.org/sites/default/files/5_Mating%20Systems%20in%20Commercial%20Beef%20Cattle%20Operations_Arial_1.pdf)

A. Van Eenennaam and K. D. Bullock. Commercial Replacement Heifer Selection. 2015. eBEEF.org (http://articles.extension.org/sites/default/files/2015-7_Commercial_Replacement_Heifer_Selection_Arial_0.pdf

Bessin, S. and K. D. Bullock.  Expected Progeny Differences Trait Definitions and Utilizing Percentile Tables.  ASC-211(January 2014). Mr. Bessin is a former student that I worked with to develop this factsheet while he was serving an internship in the Madison County Extension office.

Bullock, K. D., R. Burris, J. Lehmkuhler, L. Anderson, R. Smith, G. Rentfrow, M. Arnold, and D. Shepherd. 2012-2017 Beef Integrated Resource Management Calendars. AGR-CAL

Chapters

Bullock, K. D. Beef Sire Selection Manual (Third Edition): Assessing Management, Resources, and Marketing. National distribution through National Beef Cattle Evaluation Consortium and ASC-169 (April 2021).

Bullock, K. D. Beef Sire Selection Manual (Third Edition): Genetic Principles. National distribution through National Beef Cattle Evaluation Consortium and ASC-169 (April 2021).

Bullock, K. D. Planning the Genetics Program. The Kentucky Beef Book (ID – 108, revised May 2021).

 
Journals/Proceedings

K. D. Bullock, 2018. Practical Guide for Using EPDs in Selection Decisions. Proceedings Applied Reproductive Strategies in Beef Cattle Symposium. Ruidoso, NM. August 29-30, 2018.

K. D. Bullock, D. Brown and L. Keenan. 2017. The Power of Economic Selection Indices to Make Genetic Change in Profitability. Proceedings Beef Improvement Federation 49th Research Symposium and Annual Meeting. Athens, GA. May 31-June 3, 2017.

Educational Videos

 

Milk: Benefit or Burden. UK Beef Webinar YouTube Video (2022). K. D. Bullock and J. W. Lehmkuhler.

Western Kentucky Tornado Disaster Relief. UK Beef Webinar YouTube Video (2021). K. D. Bullock (Host)

Timely Topics for Beef. UK Beef Webinar YouTube Video (2021). K. D. Bullock (Host)

Shooting the Bull: Answering Your Beef Related Questions. UK Beef Webinar YouTube Video (2021).K. D. Bullock, K. VanValin, L. Anderson, J. Lehmkuhler, K. Laurent.

Milk. Beef Minutes YouTube Video (2021). K. D. Bullock and J. W. Lehmkuhler.

Genetic Considerations to Reduce Calving Problems. UK Beef Webinar YouTube Video (2021). K. D. Bullock

Bull Buying While Social Distancing. UK Beef Webinar YouTube Video (2020). K. D. Bullock

Past Bull Performance. Beef Minutes YouTube Video (2020). K. D. Bullock

Genomics Testing Update. Beef Minutes YouTube Video (2020). K. D. Bullock

EPDs in Bull Buying: CAIP Beef Genetic Improvement Program. (2018). Bullock, K. D.

Beef Quality and Care Assurance Overview. Module for BQCA Training (2017). K. D. Bullock, K. Laurent and B. Paul.

Genetics and Handling. Module for BQCA Training (2017). K. D. Bullock and R. Burris.

Proper Equipment and Additional Cattle Handling. Module for BQCA Training. (2017). R. Burris and K. D. Bullock

Simple Inheritance in Beef Cattle. YouTube Video (2017). K. D. Bullock

Beef Sire Selection Recommendations YouTube Video (2017). K. D. Bullock

Genetic Practices to Improve Beef Cattle Reproduction. YouTube Video (2017). K. D. Bullock

Mating Systems In Commercial Beef Cattle Operations. YouTube Video (2017). K. D. Bullock

The Genetics of Horned, Polled, Scurred. YouTube Video (2017). K. D. Bullock

What is the milk EPD? YouTube Video (2017). K. D. Bullock

How do I get improved accuracy? YouTube Video (2017). K. D. Bullock

How can I ensure I have polled calves? YouTube Video (2017). K. D. Bullock

Can I test for the polled allele? YouTube Video (2017). K. D. Bullock

Is it ok to breed a cow to a related bull? YouTube Video (2017). K. D. Bullock

What are the consequences of inbreeding? YouTube Video (2017). K. D. Bullock

Selection Basics. YouTube Video (2017). K. D. Bullock

What is maternal calving ease or calving ease maternal? YouTube Video (2015). K. D. Bullock

What is an EPD? YouTube Video (2015). K. D. Bullock

What is an economically relevant trait, or ERT? YouTube Video (2015). K. D. Bullock

Why is scrotal circumference important in yearling bulls? YouTube Video (2015). K. D. Bullock

Should commercial cattlemen select bulls with high scrotal circumference EPDs? YouTube Video (2015). K. D. Bullock

Which EPD is better for decreasing calving problems? YouTube Video (2015). K. D. Bullock

Cattle Handling and Care Certification. (2014) K. D. Bullock, K. Laurent, R. Burris, M. Arnold, J. Lehmkuhler, L. Anderson, P. Prater and B. Paul.

Cattle Genomics and Ultrasound. YouTube Video (2012). K. D. Bullock

Educational Presentations

Bullock, K. D., W. R. Burris. Utilizing Genetics and Handling Techniques for Improved Cattle Care. IACUC Training Module – 1.1.15 (January 2015)

Bullock, K. D. Genetic Defects in Beef Cattle. IACUC Training Module – 2.1.13 (November 2013)

Grants (Since 2012) Total - $2,950,113

 

Bullock K. D., L. H. Anderson, L. M. Arnold, K. H. Burdine, M. D. Hayes, J. J. Jackson, J. W. Lehmkuhler, S. R. Smith, C. Teutsch, K. R. VanValin. KY Governor's Office of Agricultural Policy (2020-22). Integrated CAIP for Beef Cattle Production. $256,602 (PI)

Anderson L. H., K. D. Bullock, R. D. Coffey, J. W. Lehmkuhler, C. H. Wood. KY Governor's Office of Agricultural Policy (2020-2021). i-Cow - A Cattle Management Tool for Today's Cattle Industry and an Electronic Portal for Education. $200,000 (Co-PI)

Lehmkuhler J. W., L. H. Anderson, K. D. Bullock, K. H. Burdine, H. Halich, C. Teutsch. Kentucky Beef Network (2019-2020). Integrated Resource Management Programs. $467,603 (Co-PI)

Bullock, K. D., L. Anderson and J. Lehmkuhler. KY Beef Network (2018-19). Kentucky Bull Assessment Program. $13,000 (PI)

Lehmkuhler, J., D. Amaral-Phillips, K. D. Bullock, L. Anderson, S. Smith Jr., R. Burris and C. Teutsch. KY Beef Network (2017-19). Integrated Resource Management Programs. $367,524. (Co-PI)

Lehmkuhler, J., D. Amaral-Phillips, K. D. Bullock, L. Anderson, S. Smith Jr., R. Burris and C. Teutsch. KY Beef Network (2017-19). Applied Master Cattleman Program. $36,250 (Co-PI)

Bullock, K. D., J. Lehmkuhler, W. R. Burris and L. H. Anderson. KY Beef Network (2017). Master Cattleman Program. $38,000 (PI)

Lehmkuhler, J., K. D. Bullock, W. R. Burris and L. H. Anderson. KY Beef Network (2017). Applied Master Cattleman Program. $16,250 (Co-PI)

Lehmkuhler, J., D. Amaral-Phillips, K. D. Bullock, L. Anderson, S. Smith Jr., R. Burris and C. Teutsch.  KY Beef Network (2017).  Integrated Resource Management Programs. $178,524. (Co-PI)

Bullock, K. D. USDA-NIFA – Sub-award from Texas A&M (2014-17). Integrated Program for Reducing Bovine Respiratory Disease Complex In Beef and Dairy Cattle. $101,176 (PI)

Bullock, K. D., J. Lehmkuhler, W. R. Burris and L. H. Anderson. KY Beef Network (2015-17). Pasture to Plate Program. $194,378 (PI)

Bullock, K. D., J. Lehmkuhler L. H. Anderson, W. R. Burris. KY Beef Network (2015-17). Cattle Handling and Care Certification Program. $20,100 (PI)

Lehmkuhler, J., K. D. Bullock, W. Burris, L. Anderson, D. Amaral-Phillips, S. Smith Jr., G. Halich and K. Burdine. KY Beef Network (2015-17). Applied Master Cattleman. $432,058. (Co-PI)

Bullock, K. D., J. Lehmkuhler L. H. Anderson, W. R. Burris. KY Beef Network (2013-14). Cattle Handling and Care Certification Program. $49,100 (PI)

 

Burris, W. R., K. D. Bullock, J. Lehmkuhler, L. H. Anderson. KY Beef Network (2013-14). Master Cattleman. $29,600 (Co-PI)

Lehmkuhler, J., D. Amaral-Phillips, S. Smith Jr., K. D. Bullock, G. Halich, K.Burdine, W. Burris, L. and Anderson. KY Beef Network (2013-14). Applied Master Cattleman. $174,160. (Co-PI)

Burris, W. R., L. H. Anderson, K. D. Bullock. KY Beef Network (2010-12). Master Cattleman. $309,788 (Co-PI)

 

Lehmkuhler, J., K. D. Bullock, L. H. Anderson, W. R. Burris. KY Beef Network (2010-12). Applied Master Cattleman. $66,000. (Co-PI)

Profile Resources

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Education

Ph.D., Animal Breeding, University of Georgia, 1992
M.S., Animal Breeding, Auburn University, 1988
B.S., Animal and Dairy Sciences, Auburn University, 1984

Contact Information

Scott Radcliffe
Department Chair

900 W.P. Garrigus Building Lexington, KY 40546-0215

+1 (859) 257-2686