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Animal Science and Veterinary
Canada
2026

D-Index & Metrics

Animal Science and Veterinary

D-Index
116
Citations
58200
World Ranking
5
National Ranking
1

Research.com Recognitions

  • 2026 - Research.com Animal Science and Veterinary in Canada Leader Award
  • 2025 - Research.com Animal Science and Veterinary in Canada Leader Award
  • 2023 - Research.com Animal Science and Veterinary in Canada Leader Award
  • 2022 - Research.com Animal Science and Veterinary in Canada Leader Award
  • 2018 - Canadian Society of Animal Science Fellowship Award
  • 2010 - Ruminant Nutrition Research Award, American Society of Animal Science
  • 2008 - Excellence in Nutrition and Meat Sciences, Canadian Society of Animal Science
  • 2004 - Technical Innovation in Enhancing Production of Safe Affordable Food, Canadian Society of Animal Science
  • 1996 - Young Scientist Award, Canadian Society of Animal Science

Overview

Tim A. McAllister is affiliated with Agriculture and Agriculture-Food Canada in Canada, focusing on research that spans agricultural and biological sciences with particular attention to biochemistry, genetics, and molecular biology.

Their research covers a range of topics related to animal science, with key emphasis on ruminant nutrition and digestive physiology, agriculture sustainability and environmental impact, and microbial interactions. Specific areas of work include:

  • Ruminant Nutrition and Digestive Physiology
  • Agriculture Sustainability and Environmental Impact
  • Bacteriophages and microbial interactions
  • Microbial infections and disease research
  • Gut microbiota and health
  • Pharmaceutical and Antibiotic Environmental Impacts
  • Aquaculture disease management and microbiota

The scientist's publication record includes contributions to multiple journals, with frequent publications in:

  • Journal of Animal Science
  • Canadian Journal of Animal Science
  • Microorganisms
  • Frontiers in Microbiology
  • Frontiers in Veterinary Science

Among recent papers authored or co-authored by McAllister are:

  • Surveillance of Enterococcus spp. reveals distinct species and antimicrobial resistance diversity across a One-Health continuum, 2020, Scientific Reports
  • Invited review: Current enteric methane mitigation options, 2022, Journal of Dairy Science
  • Machine Learning for Antimicrobial Resistance Prediction: Current Practice, Limitations, and Clinical Perspective, 2022, Clinical Microbiology Reviews
  • Strategies to improve the efficiency of beef cattle production, 2020, Canadian Journal of Animal Science
  • Utilization of by-products and food waste in livestock production systems: a Canadian perspective, 2021, Animal Frontiers

Frequent co-authors include:

  • Kim Stanford
  • Rahat Zaheer
  • Gabriel O Ribeiro
  • Kim Ominski
  • G.B. Penner

McAllister's work intersects multiple subfields of study, notably:

  • Agronomy and Crop Science
  • Ecology
  • Molecular Biology
  • Plant Science
  • Infectious Diseases

Their academic career has been recognized with several awards, including:

  • Canadian Society of Animal Science Fellowship Award, 2018
  • Ruminant Nutrition Research Award, American Society of Animal Science, 2010
  • Excellence in Nutrition and Meat Sciences, Canadian Society of Animal Science, 2008
  • Technical Innovation in Enhancing Production of Safe Affordable Food, Canadian Society of Animal Science, 2004
  • Young Scientist Award, Canadian Society of Animal Science, 1996

Best Publications

  • Rumen microbial community composition varies with diet and host, but a core microbiome is found across a wide geographical range

    Gemma Henderson;Faith Cox;Siva Ganesh;Arjan Jonker

  • Nutritional management for enteric methane abatement: A review

    K. A. Beauchemin;M. Kreuzer;F. O'Mara;T. A. McAllister

  • Silage review: Recent advances and future uses of silage additives

    R.E. Muck;E.M.G. Nadeau;T.A. McAllister;F.E. Contreras-Govea

  • A review of plant-derived essential oils in ruminant nutrition and production

    C. Benchaar;S. Calsamiglia;A.V. Chaves;G.R. Fraser

  • Microbial attachment and feed digestion in the rumen.

    T A McAllister;H D Bae;G A Jones;K J Cheng

  • Redirecting rumen fermentation to reduce methanogenesis

    T. A. McAllister;C. J. Newbold

  • Effects of Sainfoin (Onobrychis viciifolia Scop.) Condensed Tannins on Growth and Proteolysis by Four Strains of Ruminal Bacteria

    G. A. Jones;T. A. McAllister;A. D. Muir;K.-J. Cheng

  • Use of condensed tannin extract from quebracho trees to reduce methane emissions from cattle.

    K. A. Beauchemin;S. M. McGinn;T. F. Martinez;T. A. McAllister

  • Life cycle assessment of greenhouse gas emissions from beef production in western Canada: A case study

    Karen A. Beauchemin;H. Henry Janzen;Shannan M. Little;Tim A. McAllister

  • Dietary, environmental and microbiological aspects of methane production in ruminants

    T. A. McAllister;K.-J. Cheng;E. K. Okine;G. W. Mathison

  • Review: Ammonia emissions from dairy farms and beef feedlots1

    A. N. Hristov;M. Hanigan;A. Cole;R. Todd

  • Addressing global ruminant agricultural challenges through understanding the rumen microbiome: past, present and future

    Sharon A. Huws;Christopher J. Creevey;Linda B. Oyama;Itzhak Mizrahi

  • Characterization of the core rumen microbiome in cattle during transition from forage to concentrate as well as during and after an acidotic challenge.

    Renee M. Petri;Tyler Schwaiger;Greg B. Penner;Karen A. Beauchemin

  • Effect of the Protein Matrix on the Digestion of Cereal Grains by Ruminal Microorganisms

    T A McAllister;R C Phillippe;L M Rode;K J Cheng

  • A review of the effects of forage condensed tannins on ruminal fermentation and bloat in grazing cattle

    L. R. McMahon;T. A. McAllister;B. P. Berg;W. Majak

  • Update on Cryptosporidium and Giardia infections in cattle

    Merle E Olson;Ryan M O'Handley;Brenda J Ralston;Timothy A McAllister

  • Effect of Yucca schidigera on ruminal fermentation and nutrient digestion in heifers.

    A N Hristov;T A McAllister;F H Van Herk;K J Cheng

  • Giardia and Cryptosporidium in Canadian farm animals

    M.E. Olson;C.L. Thorlakson;L. Deselliers;D.W. Morck

  • Dietary mitigation of enteric methane from cattle.

    Unknown

  • Effect of rapid or gradual grain adaptation on subacute acidosis and feed intake by feedlot cattle.

    D. W. Bevans;K. A. Beauchemin;K. S. Schwartzkopf-Genswein;J. J. McKinnon

  • Effects of garlic and juniper berry essential oils on ruminal fermentation and on the site and extent of digestion in lactating cows.

    W.Z. Yang;C. Benchaar;B.N. Ametaj;A.V. Chaves

  • Duration of naturally acquired giardiosis and cryptosporidiosis in dairy calves and their association with diarrhea.

    R M O'Handley;C Cockwill;T A McAllister;M Jelinski

  • Digestion, ruminal fermentation, ciliate protozoal populations, and milk production from dairy cows fed cinnamaldehyde, quebracho condensed tannin, or Yucca schidigera saponin extracts.

    C. Benchaar;T.A. McAllister;P.Y. Chouinard

  • Distribution of sulfamethazine, chlortetracycline and tylosin in manure and soil of Canadian feedlots after subtherapeutic use in cattle.

    Marc-Oliver Aust;Frauke Godlinski;Frauke Godlinski;Greg R. Travis;Xiying Hao

Frequent Co-Authors

Kim Stanford
Kim Stanford University of Lethbridge
Karen A. Beauchemin
Karen A. Beauchemin Agriculture and Agriculture-Food Canada
Yuxi Wang
Yuxi Wang Agriculture and Agriculture-Food Canada
Trevor W. Alexander
Trevor W. Alexander Agriculture and Agriculture-Food Canada
John J. McKinnon
John J. McKinnon University of Saskatchewan
Alexandre V. Chaves
Alexandre V. Chaves University of Sydney
Michael E. R. Dugan
Michael E. R. Dugan Agriculture and Agriculture-Food Canada
W.Z. Yang
W.Z. Yang Agriculture and Agriculture-Food Canada
Jennifer L. Aalhus
Jennifer L. Aalhus Agriculture and Agriculture-Food Canada
Merle E. Olson
Merle E. Olson University of Calgary

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Related Online Degrees & Career Pathways

Exploring animal science and veterinary fields often leads students to consider complementary disciplines that enhance their skill set and career opportunities. Psychology and counseling are among these areas, as understanding behavior plays a crucial role in animal care and management. For those interested in human-animal interaction or therapy, pursuing nasp accredited online school psychology programs can provide foundational knowledge about developmental and behavioral challenges.

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Understanding addiction and family dynamics can also be instrumental in community-based animal welfare programs or veterinary social work. Programs such as addiction counseling online degree and marriage and family counseling degree online prepare students for roles that support individuals and families, often intersecting with animal-assisted interventions.

Combining animal science with these allied fields can open diverse career pathways, particularly in research, therapy, and community health, enhancing both professional impact and job flexibility.

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