College of Agriculture and Bioresources

Research Area(s)

  • Beef cattle nutrition
  • Sustainable beef systems research


Animal and Poultry Science

Research Interests

My research focus is on beef cattle growth, nutrition and carcass quality. I am particularly interested in by-product feed research as it relates to growing and finishing programs as well as the cow-calf sector. Extension activities include the Western Canadian Feedlot Management School, The Saskatchewan Beef and Forage Symposium and monthly nutrition articles for the Canadian Cattleman's Magazine


  • Ph.D., University of Saskatchewan
  • M.Sc., University of Saskatchewan
  • B.Sc., University of Manitoba

Selected Publications

M. Zenobi, P. Jefferson, H. Lardner and J.J. McKinnon. 2014. Blended By-product Feed Pellets for Backgrounding Cattle. Can. J. Anim. Sci. (Accepted).

A. D. Friedt, T. A. McAllister, M. L. He, G. B. Penner, and J. J. McKinnon. 2014. Effects of Replacing Barley Grain with Graded Levels of Wheat Bran on Rumen Fermentation, Voluntary Intake and Nutrient Digestion in Beef Cattle. Can. J. Anim. Sci. 94:129-137.

S. Amat, J.J. McKinnon, G.B. Penner, E, Simko and S. Hendrick. 2014. Evaluation of Mineral Status in High Dietary Sulphur Exposed or Sulphur-Induced Polioencephalomalacia Affected Beef Cattle. Can. J. Anim. Sci. 94:139-149.

S.  Amat, J.J. McKinnon, G.B. Penner, and S. Hendrick. 2014. Effects of Dietary Sulfur Concentration and Forage to Concentrate Ratio on Ruminal Fermentation, Sulfur Metabolism and Short Chain Fatty Acid Absorption in Beef Heifers. J. Anim. Sci. 92:712-723.  

P. Górka, J.J. McKinnon, G. B. Penner. 2013. Use of High-Lipid By-product Pellets as a Partial Replacement for Barley Grain and Canola Meal in Finishing Diets for Beef Steers. Can. J. Anim. Sci. 93:523-528.

R.M. Petri, T. Schwaiger1, G.B. Penner, K.A. Beauchemin1, R.J. Forster, J.J. McKinnon, T.A. McAllister. 2014. Characterization of the Core Rumen Microbiome in Cattle during Transition from Forage to Concentrate as well as during and after an Acidotic Challenge. PLOS ONE 8:e83424

R. Petri, T. Schwaiger, G.B. Penner, K. Beauchemin, R. Forster, J.J. McKinnon, and T. A. McAllister.  2013. Changes in the Rumen Epimural Bacterial Diversity of Beef Cattle as Affected by Diet and Induced Ruminal Acidosis.  Applied Environ Microbiol. 79:3744-55.

A. Friedt and J.J. McKinnon. 2012. Effects of Feeding Wheat Bran and Condensed Liquid Whey in Diets of Growing Cattle. Can. J. Anim. Sci. 92:501-504.

L.J. Walter, T.A. McAllister, W.Z. Yang, K.A. Beauchemin, M. He, and J.J. McKinnon, 2012.  Comparison of wheat or corn dried distillers grains with solubles on rumen fermentation and nutrient digestibility by feedlot heifers.  J. Anim. Sci., 90:1291-1300.