Don Llewellyn

Don Llewellyn
Associate Professor
Livestock Extension Specialist
P.O. Box 399
Davenport, WA  99122


“Innovation rather than Renovation”–Producers and animals scientists do a lot of things very well. It is imperative that we enhance what we do well by providing producers with timely research-based information geared toward making livestock systems work better.


Focusing on three key components related to profitability and long-term viability of beef cattle operations:

  • Beef cow nutrition/reproduction–utilize effective nutritional management to maximize the number of cows bred, and healthy calves born and marketed per cow exposed during the breeding season.
  • Livestock production, safety, and quality–This program includes providing producers the knowledge to keep cows and calves healthy throughout all stages of production.  In addition, Beef Quality Assurance (BQA) and Youth Pork Quality (PQA) Plus Assurance Training, along with proper animal handling programming helps insure safe and wholesome meat products for the consumer.
  • Management systems–Optimizing the use of available forages, protecting natural resources, and exploring the utilization of alternative feeds, forages, and supplements with a focus on reducing costs and increasing producer’s profits.


  • Norberg, O.S., D. Llewellyn, S. Fransen, S. Kesoju. 2021. Intercropping irrigated corn with two soybean maturity groups at different planting rates for forage. Crop, Forage & Turfgrass Management. e20074.
  • Allen, A. J., D. A. Llewellyn, S. R. Kerr, T. D. Hudson, J. S. Neibergs, S. M. Smith, and D. A. Moore. 2019. Developing herd health education for and assessing risky practices of cow-calf producers.  J. of Extension 57(5), available online at
  • Davis, D., G. Aiken, D. A. Llewellyn, K. Lea, and S. R. Smith. 2018. Case Study: Intake and apparent digestibility by beef calves of Alamo and Cave-in-Rock switchgrass cultivars harvested as hay at 3 different maturities.  The Professional Animal Scientist, 34:469-473.
  • Nelson, M. L., and D. A. Llewellyn. 2018. Do beef production conferences affect beef producers’ perceptions of applied research and Extension programs? J. of Extension 56(3), available online at
  • Llewellyn, D. A., R. Sero, E. Walker, J. S. Neibergs, J. P. Driver, and J. Smith. 2016. A successful youth beef exhibitor program:  Reviewing history, industry milestones, education, and 35 years of carcass excellence.  J. of NACAA, 9(1), available online at
  • Llewellyn, D. A., and T. T. Marston. 2016. Case Study:  Influence of fall liquid protein supplementation on performance of beef cows gazing native range.  J. of NACAA, 9(1), available online at
  • Llewellyn, D. A., G. Rohwer, O.S. Norberg, E. Kimura, J.S. Neibergs, and S.C. Fransen. 2015. Case Study:  Evaluating farm processed canola and camelina meals as protein supplements for beef cattle.  J. of NACAA, 8(2), available online at
  • Llewellyn, D. A., E. A. K. Schlickau, T. T. Marston, K. W. Harborth, R. M. Breiner, J. A. Unruh, and M. E. Dikeman. 2013. Influence of early weaning beef cows on the performance of male progeny and the need for winter protein supplementation. Agricultural Sciences 4(12):701-708.
  • Llewellyn, D. A. 2013. Finding first-year success in Extension:  Navigating stakeholder needs and institutional expectations.  J. Human Sci. Ext. 1(1):115-124.