Employee Directory

Over the past twenty years, I have fulfilled full-time faculty appointments within divisions of agriculture at institutions of higher education. Most of these appointments included the assignment of advising or managing animal laboratory (cattle and horse) units as well as coaching college rodeo teams. 

I like to learn and share what I learn with others, with decades of proven ability to simplify and clarify intricate information so it is understandable, applicable, and enjoyable to engage.

My research efforts have focused on mitigating oxidative stress by implementing injectable trace mineral protocols into cattle husbandry strategies to improve foraging (2025, 2024) and performance (growth and fertility, 2018).

Outside of my professional experiences, I have a lifetime of practical experiences in every phase of live cattle production. My earliest experiences are complemented by back-to-back State FFA Beef Production Proficiency awards (1997 and 1998), followed by years of managing and owning beef cattle operations, as well as dayworking for many feedlots, backgrounder and cow-calf producers. 

In addition to my formal education and professional experiences, I have held elected leadership roles in county Farm Bureau Boards, Extension Councils, Cattlemen’s Associations, Fair Boards, and nationally with the United States Cattlemen’s Association. 

My research efforts have focused on mitigating oxidative stress by implementing injectable trace mineral protocols into cattle husbandry strategies to improve foraging (2025, 2024) and performance (growth and fertility, 2018).

East Texas A&M University; 2022-2025

ANS 1319: Animal Science

ANS 317: Livestock Management 

ANS 319: Animal Anatomy and Physiology

ANS 412: Beef Cattle Management 

ANS 419: Diseases and Parasites of Livestock

EQSC 342: Equine Nutrition

VETT 305/306: Veterinary Anatomy and Physiology I

ANS 307: Feeds and Feeding

• Facilitate undergraduate coursework
  • Wilbourn, N., B. Housewright, and L.T. Sullivan. 2025. The implications of the scientific developments behind oxidative stress, heat-shock proteins, and antioxidants on neurodegenerative pathology. East Texas A&M University Annual Research Symposium.   

Buena Vista University; 2019-2022

AGSC 200: Animal Science

AGSC 300: Animal Physiology

AGSC 310: Animal Nutrition 

AGSC 315: Animal Behavior

AGSC 325: Animal Reproduction

AGSC 330: Animal Breeding and Genetics

AGSC 420: Animal Health and Wellbeing

• Facilitate undergraduate research 
  • DeRose, F., H. Coronel, K. Bodisch and L.T. Sullivan. 2022. Correlation between Hair Whorls and Temperament in Equus Caballus. BVU 17^th Annual Scholars Day.
  • Miller, A. and L.T. Sullivan. 2022. Evaluation of the Correlation between Horsehair, Body Condition Score and Age in Equus Caballus. 
  • Nelson, B., M. Tjaden and L.T. Sullivan. 2021. Factors Contributing to Horsehair Length. BVU 16^th Annual Scholars Day. 
  • Brown, R. and L.T. Sullivan. 2021. Correlations of Pelvic Measurements to calving ease in first-calf heifer beef cattle. BVU 16^th Annual Scholars Day. 

Mt. San Antonio College; 2014-2016

AGAN 1: Animal Science

AGAN 2: Animal Nutrition

AGAN 94: Animal Breeding

AGLI 16: Horse Production and Management

AGLI 18: Horse Ranch Management

AGLI 20: Horse Behavior and Training

AGLI 51: Animal Handling and Restraint

North Arkansas College; 2005-2012

AGRI 1004: Introduction to Animal Science

AGRI 2023: Introduction to the Equine Industry

AGRI 2213: Behavior of Domestic Animals

AGRI 2143: Feeds and Feeding

AGRI 2013: Pest Management

AGRI 1204: Introduction to Plant Science 

AGRI 2204: Soil Science

AG 1303: Principles of Agronomy 

• Provide instruction of Non-Credit Courses for Community Organizations
  • “It’s not dirt it’s Soil”; Master Gardeners 

Cochise Community College; 2004

AGR 208: Animal Science

AGR 214: Soil Science

Johnson County Westside High School; 2003-2004

Introduction to Agriculture Systems Technology

Animal Science

Plant Science

Ag Mechanics

Greenhouse Management

University of Idaho                                                   Moscow, Idaho

Doctor of Philosophy in Animal Physiology

Currently Enrolled

Expected completion: 2026

Angelo State University:                                          San Angelo, Texas 

Master of Science in Animal Science 

Completed December 2018

University of Arkansas:                                           Fayetteville, Arkansas 

Master of Arts in Teaching Agriculture Education 

Completed May 2003 

Bachelor of Science in Agriculture Extension Education

Completed May 2002 

Publications:

Sullivan, L.T., K.S. Jensen, J. England, L.G. Gimenez-Lirola, S. Radke, J.B. Hall, J.B. Glaze, Jr., C. Willmore, J. Brennan, P. Rezamand, R.J. Collier, B. Murdoch and J. Sprinkle. Mitigation of Oxidative Stress to Improve Range Cow Grazing Distribution. American Society of Animal Science. Southern/Western Section. April, 2025. Arlington, Texas. 

Sprinkle, J., L.T. Sullivan, S. Jensen, M. Ellison, J.B. Hall, C.M. Willmore, J. Sagers, J.V. Yelich, B. Glaze, J. Brennan, R. M. Lewis, J.B. Taylor, B. Murdoch, D.R. Tolleson, P. Clark, M. Roberts-Lew, and J. Lamb. 2024. 369 Unlocking the mysteries of cow and calf grazing behavior on rugged rangeland pastures using GPS and accelerometer sensor technology. Journal of Animal Science. 102:3. Pgs 195-196. https://doi.org/10.1093/jas/skae234.229

Sullivan, L.T., J.W. Dickison, C.M. Harris, M.W. Salisbury, and C. A. Runyan. 2018. Evaluation of essential oil and injectable trace mineral on bull growth performance and fertility. Transl. Anim. Sci. 2:S189–S192 doi: 10.1093/tas/txy055. PMID: 32704771; PMCID: PMC7200923. https://doi.org/10.1093/tas/txy055

Sullivan, L.T., K. S. Jensen, J. England, L. G. Gimenez-Lirola, S. Radke, J. Hall, B. Glaze, C. Willmore, S. Goddard, J. Brennan, B. Murdoch, and J. Sprinkle. 2024. Mitigation of Oxidative Stress to Improve Range Cow Grazing Behavior. AVS 501 Seminar. 15 November 2024. 

Sullivan, L.T., K. S. Jensen, J. England, L. G. Gimenez-Lirola, S. Radke, J. Hall, B. Glaze, C. Willmore, S. Goddard, J. Brennan, B. Murdoch, and J. Sprinkle. 2022. Evaluation of genetic, physiological, and environmental factors on grazing behavior of range cattle. AVS 501 Seminar. 6 May 2022. 

Stewart, B., Beck, P., L.T. Sullivan, M. Sims, and J. Jennings. Reducing Winter Feeding Needs in Southern Arkansas Through the Use of Best Management Grazing Principles. 2014. Joint Annual Meeting (JAM).

Popular Press:

Stuebner, Steve. 2025. “In Search of the Perfect Range Cow; University of Idaho study finds clues with rocket science technology”. Idaho Rangeland Resources Commission. Director: Chris Ennis and NuVision Productions. Narrated by Barbara Thometz. https://www.youtube.com/watch?v=pyz2Jz7bkXc

Sprinkle, J., L.T. Sullivan, J.B. Hall, K.S. Jensen, J.B. Glaze, Jr., M. Stegemiller, and B. Murdoch. Cow and calf grazing behavior on rangeland. January 2025. https://www.agproud.com/articles/60867-cow-and-calf-grazing-behavior-on-rangeland

O’Connell, John. “U of I researches attributes of cattle that thrive on range.” Western Livestock Journal. Jul 8, 2022. https://www.wlj.net/top_headlines/u-of-i-researches-attributes-of-cattle-that-thrive-on-range/article_775a6b8c-feee-11ec-8df3-73baa574318a.html

Conferences and Proceedings:

Sullivan, L.T. (Presenter), J. Sprinkle, S. Jensen, J. Hall, B. Glaze, J. England, C. Willmore, M. Stegemiller, B. Murdoch, J. Brennan, J. Champion, L. Gimenez, and S. Radke. Maternal influences upon calf adaptability to rangeland. Rinker Rock Creek Ranch Research Webinar, Idaho Virtual Meeting, 4 March 2022.

Jensen, K.S., J. Sprinkle, and L.T. Sullivan. Finding the Ideal Cow to Fit Idaho Rangelands. Owyhee County Winter Beef School, Oreana, Idaho. February 5, 2022.

Jensen, K.S., J. Sprinkle, and L.T. Sullivan. 2022. Finding the Ideal Cow for Idaho Rangelands. National Association of County Agricultural Agents Western Region Professional Improvement Conference. Tucson, Arizona.

Jensen, S. (Presenter), J. Sprinkle, and L.T. Sullivan. Finding the ideal cow to fit Idaho rangelands. 2022 National Association of County Agricultural Agents Annual Meeting & Professional Improvement Conference, West Palm Beach, FL, 19 July 2022. 

Sprinkle, J., L.T. Sullivan, S. Jensen, J. Hall, B. Murdoch, and S. Goddard. Maternal influences upon calf adaptability to rangeland. Rinker Rock Creek Ranch Research Webinar, 1 March 2021. 

Sullivan, L.T., J.W. Dickison, C.M. Harris, M.W. Salisbury, and C. A. Runyan. 2018. Evaluation of essential oil and injectable trace mineral on bull growth performance and fertility. American Society of Animal Science; Western Section. June 19-21, 2018. Bend, Oregon 

Extension Reports:

Sprinkle, J., J. B. Hall, L.T. Sullivan, S. Jensen, B. Glaze, M. Stegemiller, and B. Murdoch. 2022. Maternal Influences Upon Calf Adaptability to Rangeland 4 pp. David Little Range Management Endowment Grant Report.

Sprinkle, J., J. B. Hall, L.T. Sullivan, and S. Jensen. 2021. Maternal Influences Upon Calf Adaptability to Rangeland. 6 pp. David Little Range Management Endowment Grant Report.

Posters:

Wilbourn, N., B. Housewright, and L.T. Sullivan. 2025. The implications of the scientific developments behind oxidative stress, heat-shock proteins, and antioxidants on neurodegenerative pathology. East Texas A&M University Annual Research Symposium.   

DeRose, F., H. Coronel, K. Bodisch and L.T. Sullivan. 2022. Correlation between Hair Whorls and Temperament in Equus Caballus. BVU 17^th Annual Scholars Day.

Miller, A. and L.T. Sullivan. 2022. Evaluation of the Correlation between Horsehair, Body Condition Score and Age in Equus Caballus. 

Sprinkle, J., J. Hall, M. Ellison, J. Yelich, J. Sagers, B. Murdoch, C. Willmore,  B. Glaze, L.T. Sullivan, S. Jensen, M. Roberts-Lew, J. England, B. Taylor, J. Brennan, P. Clark, D. Tolleson, R. Lewis, and J. Lamb. 2021. Finding the ideal cow for Idaho rangelands. Rinker Rock Creek Ranch Field Day,  Hailey, ID, 12 June 2021. Also for UI President’s Tour at RRCR, 14 June 2021. Poster prepared by Dr. April Hulet with information provided.

Nelson, B., M. Tjaden and L.T. Sullivan. 2021. Factors Contributing to Horsehair Length. BVU 16^th Annual Scholars Day. 

Brown, R. and L.T. Sullivan. 2021. Correlations of Pelvic Measurements to calving ease in first-calf heifer beef cattle. BVU 16^th Annual Scholars Day.