Montana State University

Department of Animal & Range Sciences

P.O. Box 172900
Bozeman, MT 59717-2900
Email: animalrange@montana.edu

Tel: (406) 994-3722
Fax: (406) 994-5589
Location: 103 Animal Bioscience Building

Department Head:

Dr. Glenn Duff

Dr. Patrick Hatfield

Photo of Pat Hatfield
Dr. Hatfield

Professor, Animal Science
113 Animal Bioscience Building
Montana State University
Bozeman, MT 59717
Phone: (406) 994-7952
Fax: (406) 994-5589
Email: hatfield@montana.edu

Education

B.S.  Montana State University, Range Science, 1983
M.S.  New Mexico State University, Range Science, 1985
Ph.D.  University of Nebraska-Lincoln, Ruminant Nutrition, 1988

Classes

ANSC 222  Livestock in Sustainable Systems  ‹ Syllabus
ANSC 232  Livestock Management - Sheep  ‹ Syllabus
ANSC 432  Sheep Management  ‹ Syllabus
ARNR 521  Advanced Ruminant Nutrition  ‹ Syllabus

Research Interests

  • Incorporating sheep into sustainable crop production systems for insect and weed pest control, and residue management.
  • Nutritional and management factors that improve sheep production efficiency.

Accomplishments and Interests

  • Investigate alternatives to traditional crop residue and fallow management using sheep to control weed and insect pests and enhance soil nutrient cycling.
  • Develop strategic nutritional intervention strategies for the late gestating ewe to minimize neonatal losses by improving lamb immune function and/or fetal and neonate energetic status.
  • Determine profitable management options that enhance quality and expand the availability of market ready lean lamb beyond current seasonal limits.
  • Develop and maintain online programs to aid students and producers in making sound nutrition and management decisions.
  • 68 peer reviewed publications, 1 book chapter, 31 invited papers, 100 proceedings, abstract, and research reports, 33 popular press articles.
  • $8.3 million in competitive research, teaching, and USDA special grants.
  • 2011 MSU meritorious award
  • 2012 MSU meritorious award
  • MSU Sheep Ration Program
  • Ewe Cost and Sheep Grazing Crop Residue Partial Budgeting Programs

Recent Publications

Peer-Reviewed

  • Ragen, D. L., E. E. Nix, R. L. Endecott, P. G. Hatfield, M. K. Petersen, and J.G.P. Bowman.  2013.  Individual mineral supplement intake by ewes swath grazing or confinement fed pea barley forage.  Small Ruminant Res.  (Accepted)
  • Ragen, D. L., R. R. Redden, A. N. Hafla, B. M. Nichols, J. L. Nichols, J. I. Keithly, T. J. McDonald, J. Uhrig, L. A. Cook, A. L. Kellom, and P. G. Hatfield.  2013.  Technical Note:  Effects of supplementation of expired human foodstuffs on intake and digestion of wethers fed a base diet of grass hay and alfalfa pellets.  Sheep & Goat Res. J.  28:1-5.
  • Barsotti, J. L., U. M. Sainju, A. W. Lenssen, C. Montagne, and P. G. Hatfield.  2013.  Crop yields and soil organic matter responses to sheep grazing in the U.S. Northern Great Plains.  Soil & Till. Res.  134:133-141.
  • Lenssen, A. W., U. M. Sainju, and P. G. Hatfield.  2013.  Integrating sheep grazing into wheat-fallow systems:  Crop yield and soil properties.  Field Crop Res.  146:75-85.
  • Barsotti, J. L., U. M. Sainju, A. W. Lenssen, C. Montagne, and P. G. Hatfield.  2013.  Net greenhouse gas emissions affected by sheep grazing in dryland cropping systems.  Soil Sci. Soc. Am. J.  77:1012-1025.
  • Goosey, H. P., J. P. Hatfield, M. G. Rolston, G. D. Johnson, and P. G. Hatfield.  2013.  Hymenoptera parasitoid response to sheep grazing tillage, and herbicides in wheat-fallow rotations.  J. Kansas Entomological Soc.
  • Keithly, J. I., R. W. Kott, J. G. Berardinelli, S. Moreaux, and P. G. Hatfield.  2011.  Thermogenesis, blood metabolites and hormones, and growth of lambs born to ewes supplemented with docosahexaenoic acid.  J. Anim. Sci.  89:4305-4313.
  • Sainju, U. M., A. W. Lenssen, H. B. Goosey, E. Snyder, and P. G. Hatfield.  2011.  Sheep grazing in the wheat-fallow system affects dryland soil properties and grain yield.  Soil. Sci. Soc. Am. J.  75:1789-1798.
  • Moreaux, J. J., J. L, Nichols, J.G.P. Bowman, and P. G. Hatfield.  2011.  Psyllium lowers blood glucose and insulin concentrations in horses.  J. Equine Vet. Sci.  31:160-165.
  • Lenssen, A. W., S. D. Cash, P. G. Hatfield, U. M. Sainju, W. R. Grey, S. L. Blodgett, H. B. Goosey, D. A. Griffith, and G. D. Johnson.  2010.  Yield, quality, and water and nitrogen use of Durum and annual forages in two-year rotations.  Agronomy J.  102:1261-1268.
  • Kott, R. W., L.M.M. Surber, A. V. Grove, P. G. Hatfield, J. A. Boles, C. R Flynn, and J. W. Bergman.  2010.  Feedlot performance, carcass characteristics, and muscle CLA concentration of lambs fed diets supplemented with safflower seeds and vitamin E.  Sheep & Goat Res. J.  25:16-22.
  • Sainju, U. M., A. W. Lenssen, H. B. Goosey, E. Snyder, and P. G. Hatfield.  2010.  Dryland soil carbon and nitrogen influenced by sheep grazing in the wheat-fallow system.  Agronomy J.  102:1153-1561.
  • Redden, R. R., R. W. Kott, J. A. Boles, A. W. Layton, and P. G. Hatfield.  2010.  Effects of late gestation supplementation of rumen undegradable protein, vitamin E, zinc, and chlortetracycline to ewes on indices of immune transfer and productivity.  J. Anim. Sci.  88:1125-1134.
  • Redden, R. R., R. W. Kott, L.M.M. Surber, J. A. Boles, A. W. Layton, and P. G. Hatfield.  2010.  Post-weaning management of lambs alters subsequent feedlot performance and tissue deposition.  Sheep & Goat Res. J.  24:26-31.
  • Dafoe, J. M., R. W. Kott, B. F. Sowell, J. G. Berardinelli, K. C. Davis, and P. G. Hatfield.  2008.  Effects of supplemental safflower and vitamin E during late gestation on lamb growth, serum metabolites, and thermogenesis.  J. Anim. Sci.  86:3194-3202.
  • Hatfield, P. G., S. L. Blodgett, T. M. Spezzano, H. B. Goosey, A. W. Lenssen, R. W. Kott, and C. B. Marlow.  2007.  Incorporating sheep into dryland grain production systems:  I.  Impact on over-wintering larva populations of Wheat stem sawfly, Cephus cintus Norton (Hymenoptera: Cephidae).  Small Rum. Res.  67:209-215.
  • Hatfield, P. G., A. W. Lenssen, T. M. Spezzano, S. L. Blodgett, H. B. Goosey, R. W. Kott, and C. B. Marlow.  2007.  Incorporating sheep into dryland grain production systems:  II.  Impact on changes in biomass and weed frequency.  Small Rum. Res.  67:216-221.
  • Hatfield, P. G., H. B. Goosey, T. M. Spezzano, S. L. Blodgett, A. W. Lenssen, R. W. Kott, and C. B. Marlow.  2007.  Incorporating sheep into dryland grain production systems: III. Impact on changes in soil bulk density and soil nutrient profiles.  Small Rum. Res.  67:222-231.

Invited Papers and Presentations

Proceedings, Abstracts, and Station Reports

  • Nix, E. E., D. L. Ragen, J.G.P. Bowman, R. W. Kott, and P. G. Hatfield.  2012.  Effect of swath grazing on forage intake and wastage by ewes.  Proc. West. Sec. Amer. Soc. Anim. Sci.  63:
  • Ragen, D. L., E. E. Nix, R. L. Endecott, P. G. Hatfield, and J.G.P. Bowman.  2012.  Individual mineral-supplement intake by ewes swath grazing or confinement fed pea-barley forage.  Proc. West. Sec. Amer. Soc. Anim. Sci.  63:
  • Ragen, D. L., E. E. Nix, R. L. Endecott, P. G. Hatfield, and J.G.P. Bowman.  2012.  Individual mineral-supplement intake by ewes swath grazing or confinement fed pea-barley forage.  Proc. MT Nutr. Conference.
  • Barsotti, J. L., U. Sainju, A. Lenssen, C. Montagne, and P. Hatfield.  2012.  Effect of sheep grazing on soil carbon and nitrogen in dryland cropping systems.  Proc. MT Nutr. Conference.
  • Paramjit Singh G., K. M. O’Neill, and P. G. Hatfield.  2012.  Effects of alternative management practices on the abundance and diversity of arthropods in a mixed-crop agroecosystem.  Proc. MT Nutr. Conference.
  • Sainju, U. M., A. W. Lenssen, H.B. Goosey, E. Snyder, and P. G. Hatfield.  2011.  Sheep grazing effect on dryland soil carbon and nitrogen in the wheat-fallow system.  Western Nutr. Management Conf.  9:146-151.
  • Graves, M., J. Mangold, H. Goosey, P. Hatfield, and F. Menalled.  2011.  Impact of sheep grazing on demographic parameters of cheatgrass (Bromus tectorum) and wild oat (Avena fatua) in three common Montana agricultural systems.  SRM
  • Sainju, U. M., A. W. Lenssen, H. B. Goosey, E. Snyder, and P. G. Hatfield.  2011.  Sheep grazing effect on dryland soil carbon and nitrogen in the wheat-fallow system.  Proc. Western Nutrient Management Conference.
  • Hanson, M., P. G. Hatfield, H. Goosey, and F. Menalled.  2010.  Impact of strategic sheep grazing on weed communities.  Joint annual meeting, Soc. Range Manage and Weed Sci. Soc. Am.  Denver CO., Febuary, 2010.  (Abstr.)
  • Keithly, J. A., R. W. Kott, J. G. Berardinelli, S. Moreaux, and P. G. Hatfield.  2010.  Thermogenesis, serum metabolites, and growth in lambs born to ewes supplemented with docosahexaenoic acid.  Proc. West. Sec. Amer. Soc. Anim. Sci.  61:
  • Peterson, J. L., S. J. Moreaux, J.G.P. Bowman, P. G. Hatfield, J. G. Berardinelli, and J. Olsen.  2009.  Metabolic and physical effects of psyllium supplementation on quarter horses.  Proc. West. Sec. Amer. Soc. Anim. Sci.  60:176-179.
  • Keithly, J., A. Hafla, T. McDonald, B. Nichols, J. Peterson, R. Redden, J. Uhrig, L. Voigt, A. Kellom, J. Paterson, and P. Hatfield.  2009.  Dry matter intake and digestibility by lambs supplemented with expired foods (donuts, chips, and macaroni) and barley.  Proc. Mont. Nutr. Conf.
  • Redden, R. R., R. W. Kott, L.M.M. Surber, J. A. Boles, A. W. Layton, and P. G. Hatfield.  2009.  Feedlot performance of lambs from different backgrounding systems.  Proc. West. Sec. Amer. Soc. Anim. Sci.  59:95-98.
  • Redden, R. R., R. W. Kott, J. A. Boles, A. W. Layton, and P. G. Hatfield.  2008.  Effects of vitamin E, zinc, by-pass protein, and chlortetracycline to ewes of different age and body condition on lamb production and immune function.  Proc. West. Sec. Amer. Soc. Anim. Sci.  59:336-338.
  • Redden, R. R., R. W. Kott, L.M.M. Surber, J. A. Boles, A. W. Layton, and P. G. Hatfield.  2008.  Feedlot performance of lambs from different backgrounding systems.  Montana State Univ. Rum. Nutr. Conf.
  • Snyder, E. E., H. B. Goosey, P. G. Hatfield, and A. W. Lenssen.  2007.  Sheep grazing wheat summer fallow and the impact on soil nitrogen, moisture, and crop yield.  West. Sec. Amer. Soc. Anim. Sci.  58:221-224.

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