World's Best Scientists 2026 revealed!
Todd F. Duffield

Todd F. Duffield

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Animal Science and Veterinary
Canada
2026

D-Index & Metrics

Animal Science and Veterinary

D-Index
79
Citations
23224
World Ranking
87
National Ranking
10

Todd F. Duffield publication distribution in Animal Science and Veterinary in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Animal Science and Veterinary in 2026. The highlighted bar marks where Todd F. Duffield sits on this spectrum.

29–33 publications: 1 scientists 34–38 publications: 6 scientists 39–43 publications: 17 scientists 44–48 publications: 23 scientists 49–53 publications: 28 scientists 54–58 publications: 44 scientists 59–63 publications: 66 scientists 64–68 publications: 75 scientists 69–73 publications: 71 scientists 74–78 publications: 85 scientists 79–83 publications: 108 scientists 84–88 publications: 105 scientists 89–93 publications: 84 scientists 94–98 publications: 103 scientists 99–103 publications: 97 scientists 104–108 publications: 95 scientists 109–113 publications: 89 scientists 114–118 publications: 88 scientists 119–123 publications: 109 scientists 124–128 publications: 93 scientists 129–133 publications: 89 scientists 134–138 publications: 95 scientists 139–143 publications: 92 scientists 144–148 publications: 80 scientists 149–153 publications: 75 scientists 154–158 publications: 74 scientists 159–163 publications: 67 scientists 164–168 publications: 53 scientists 169–173 publications: 62 scientists 174–178 publications: 63 scientists 179–183 publications: 50 scientists 184–188 publications: 55 scientists 189–193 publications: 50 scientists 194–198 publications: 27 scientists 199–203 publications: 44 scientists 204–208 publications: 31 scientists 209–213 publications: 28 scientists 214–218 publications: 38 scientists 219–223 publications: 33 scientists 224–228 publications: 36 scientists 229–233 publications: 29 scientists 234–238 publications: 35 scientists 239–243 publications: 23 scientists 244–248 publications: 24 scientists 249–253 publications: 29 scientists 254–258 publications: 28 scientists 259–263 publications: 21 scientists 264–268 publications: 25 scientists 269–273 publications: 11 scientists 274–278 publications: 18 scientists 279–283 publications: 13 scientists 284–288 publications: 18 scientists 289–293 publications: 10 scientists 294–298 publications: 12 scientists 299–303 publications: 11 scientists 304–308 publications: 15 scientists 309–313 publications: 14 scientists 314–318 publications: 14 scientists 319–323 publications: 8 scientists 324–328 publications: 8 scientists 329–333 publications: 13 scientists 334–338 publications: 14 scientists 339–343 publications: 13 scientists 344–348 publications: 10 scientists 349–353 publications: 11 scientists 354–358 publications: 5 scientists 359–363 publications: 8 scientists 364–368 publications: 8 scientists 369–373 publications: 6 scientists 374–378 publications: 7 scientists 379–383 publications: 8 scientists 384–388 publications: 3 scientists 389–393 publications: 4 scientists 394–398 publications: 5 scientists 399–403 publications: 8 scientists 404–408 publications: 5 scientists 409–413 publications: 4 scientists 414–418 publications: 3 scientists 419–423 publications: 8 scientists 424–428 publications: 5 scientists 429–433 publications: 3 scientists 434–438 publications: 5 scientists 439–441 publications: 5 scientists 442+ publications: 99 scientists
29 publications 442+

This scientist: 328 publications — 92nd percentile

92% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 442 publications or more.

Todd F. Duffield D-index placement in Animal Science and Veterinary in 2026

The chart shows the D-index (discipline H-index) distribution of Animal Science and Veterinary scientists ranked by Research.com in 2026. The highlighted bar marks where Todd F. Duffield sits on this spectrum.

20 D-Index: 5 scientists 21 D-Index: 22 scientists 22 D-Index: 31 scientists 23 D-Index: 44 scientists 24 D-Index: 53 scientists 25 D-Index: 66 scientists 26 D-Index: 80 scientists 27 D-Index: 101 scientists 28 D-Index: 106 scientists 29 D-Index: 116 scientists 30 D-Index: 154 scientists 31 D-Index: 158 scientists 32 D-Index: 143 scientists 33 D-Index: 137 scientists 34 D-Index: 126 scientists 35 D-Index: 134 scientists 36 D-Index: 112 scientists 37 D-Index: 115 scientists 38 D-Index: 105 scientists 39 D-Index: 111 scientists 40 D-Index: 107 scientists 41 D-Index: 87 scientists 42 D-Index: 74 scientists 43 D-Index: 62 scientists 44 D-Index: 61 scientists 45 D-Index: 41 scientists 46 D-Index: 51 scientists 47 D-Index: 43 scientists 48 D-Index: 28 scientists 49 D-Index: 47 scientists 50 D-Index: 40 scientists 51 D-Index: 34 scientists 52 D-Index: 33 scientists 53 D-Index: 43 scientists 54 D-Index: 16 scientists 55 D-Index: 32 scientists 56 D-Index: 21 scientists 57 D-Index: 18 scientists 58 D-Index: 28 scientists 59 D-Index: 33 scientists 60 D-Index: 17 scientists 61 D-Index: 21 scientists 62 D-Index: 18 scientists 63 D-Index: 21 scientists 64 D-Index: 9 scientists 65 D-Index: 20 scientists 66 D-Index: 11 scientists 67 D-Index: 16 scientists 68 D-Index: 12 scientists 69 D-Index: 17 scientists 70 D-Index: 13 scientists 71 D-Index: 15 scientists 72 D-Index: 11 scientists 73 D-Index: 11 scientists 74 D-Index: 14 scientists 75 D-Index: 5 scientists 76 D-Index: 6 scientists 77+ D-Index: 100 scientists
20 D-Index 77+

This scientist: 79 D-Index — 97th percentile

97% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 77 D-Index or more.

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

Overview

What is he best known for?

The fields of study he is best known for:

  • Internal medicine
  • Surgery
  • Disease

Todd F. Duffield spends much of his time researching Dairy cattle, Animal science, Lactation, Ice calving and Herd. Todd F. Duffield performs integrative study on Dairy cattle and Ketosis. His Animal science research includes elements of Biochemistry and Acidosis.

His studies in Lactation integrate themes in fields like Veterinary medicine, Monensin and Dry matter. His biological study spans a wide range of topics, including Endocrinology, Internal medicine, Insemination and Abomasum. His work in Herd addresses issues such as Metritis, which are connected to fields such as Endometritis.

His most cited work include:

  • Defining and diagnosing postpartum clinical endometritis and its impact on reproductive performance in dairy cows. (540 citations)
  • Endometrial cytology and ultrasonography for the detection of subclinical endometritis in postpartum dairy cows. (421 citations)
  • Impact of hyperketonemia in early lactation dairy cows on health and production. (410 citations)

What are the main themes of his work throughout his whole career to date?

Todd F. Duffield mainly investigates Animal science, Dairy cattle, Ice calving, Herd and Lactation. His Dry matter study in the realm of Animal science interacts with subjects such as Ketosis. His Dairy cattle research is multidisciplinary, relying on both Metritis, Incidence, Monensin, Meta-analysis and Placebo.

His work in Metritis addresses subjects such as Endometritis, which are connected to disciplines such as Vaginal discharge. His Ice calving research incorporates themes from NEFA, Internal medicine, Endocrinology and Postpartum period. His Herd course of study focuses on Paratuberculosis and Feces.

He most often published in these fields:

  • Animal science (52.78%)
  • Dairy cattle (33.33%)
  • Ice calving (28.57%)

What were the highlights of his more recent work (between 2018-2021)?

  • Animal science (52.78%)
  • Ice calving (28.57%)
  • Dry matter (13.49%)

In recent papers he was focusing on the following fields of study:

Todd F. Duffield mainly focuses on Animal science, Ice calving, Dry matter, Herd and Straw. He studies Culling which is a part of Animal science. Todd F. Duffield regularly links together related areas like Mastitis in his Ice calving studies.

His research in Dry matter intersects with topics in Urine and Lactation. His study in Lactation is interdisciplinary in nature, drawing from both Insemination and Artificial insemination. Todd F. Duffield works mostly in the field of Meta-analysis, limiting it down to topics relating to Dairy cattle and, in certain cases, Gold standard.

Between 2018 and 2021, his most popular works were:

  • Evaluation of a multispecies probiotic as a supportive treatment for diarrhea in dairy calves: A randomized clinical trial. (10 citations)
  • Risk factors associated with failed transfer of passive immunity in male and female dairy calves: A 2008 retrospective cross-sectional study. (8 citations)
  • Effects of wheat straw chop length in high-straw dry cow diets on intake, health, and performance of dairy cows across the transition period. (6 citations)

In his most recent research, the most cited papers focused on:

  • Internal medicine
  • Surgery
  • Pathology

His main research concerns Ice calving, Animal science, Dairy cattle, Total mixed ration and Straw. The various areas that he examines in his Ice calving study include Cross-sectional study, Colostrum, Passive immunity and Total protein. He is involved in the study of Animal science that focuses on Herd in particular.

Todd F. Duffield interconnects Meta-analysis, Internal medicine, Incidence, Mastitis and Test day in the investigation of issues within Dairy cattle. The concepts of his Internal medicine study are interwoven with issues in Penicillin, Cloxacillin and Antimicrobial. His Total mixed ration research is multidisciplinary, incorporating elements of Silage, Dry matter and Reticulorumen.

Best Publications

  • Defining and diagnosing postpartum clinical endometritis and its impact on reproductive performance in dairy cows.

    S.J. LeBlanc;T.F. Duffield;K.E. Leslie;K.G. Bateman

  • Impact of hyperketonemia in early lactation dairy cows on health and production.

    T.F. Duffield;K.D. Lissemore;B.W. McBride;K.E. Leslie

  • Endometrial cytology and ultrasonography for the detection of subclinical endometritis in postpartum dairy cows.

    R Kasimanickam;T.F Duffield;R.A Foster;C.J Gartley

  • Subclinical ketosis in lactating dairy cattle

    Todd Duffield

  • Major Advances in Disease Prevention in Dairy Cattle

    S.J. LeBlanc;K.D. Lissemore;D.F. Kelton;T.F. Duffield

  • Metabolic Predictors of Displaced Abomasum in Dairy Cattle

    S.J. LeBlanc;K.E. Leslie;T.F. Duffield

  • The association of serum metabolites with clinical disease during the transition period

    N. Chapinal;M. Carson;T.F. Duffield;M. Capel

  • Comparison of techniques for measurement of rumen pH in lactating dairy cows

    T. Duffield;J.C. Plaizier;A. Fairfield;R. Bagg

  • Risk factors for postpartum uterine diseases in dairy cows.

    J. Dubuc;T.F. Duffield;K.E. Leslie;J.S. Walton

  • The effect of subclinical ketosis in early lactation on reproductive performance of postpartum dairy cows.

    R.B. Walsh;J.S. Walton;D.F. Kelton;S.J. LeBlanc

  • Definitions and diagnosis of postpartum endometritis in dairy cows.

    J. Dubuc;T.F. Duffield;K.E. Leslie;J.S. Walton

  • Clostridium difficile in retail ground meat, Canada.

    Alexander Rodriguez-Palacios;Henry R. Staempfli;Todd Duffield;J. Scott Weese

  • Use of test day milk fat and milk protein to detect subclinical ketosis in dairy cattle in Ontario.

    T F Duffield;D F Kelton;K E Leslie;K D Lissemore

  • The association of serum metabolites in the transition period with milk production and early-lactation reproductive performance.

    N. Chapinal;M. E. Carson;S. J. LeBlanc;K. E. Leslie

  • A comparison of the cytobrush and uterine lavage techniques to evaluate endometrial cytology in clinically normal postpartum dairy cows

    Ramanathan Kasimanickam;Todd F Duffield;Robert A Foster;Cathy J Gartley

  • Efficacy of Monensin for the Prevention of Subclinical Ketosis in Lactating Dairy Cows

    T.F. Duffield;D. Sandals;K.E. Leslie;K. Lissemore

  • The effect of treatment of clinical endometritis on reproductive performance in dairy cows

    S. J. LeBlanc;T. F. Duffield;K. E. Leslie;K. G. Bateman

  • Effects of a Subacute Ruminal Acidosis Model on the Diet Selection of Dairy Cows

    J.E. Keunen;J.C. Plaizier;L. Kyriazakis;T.F. Duffield

  • Metabolic predictors of post-partum disease and culling risk in dairy cattle.

    Hesam A. Seifi;Stephen J. LeBlanc;Ken E. Leslie;Todd F. Duffield

  • Invited review: Use of meta-analysis in animal health and reproduction: methods and applications.

    I.J. Lean;A.R. Rabiee;T.F. Duffield;I.R. Dohoo

  • The effect of meloxicam on behavior and pain sensitivity of dairy calves following cautery dehorning with a local anesthetic.

    A. Heinrich;T.F. Duffield;K.D. Lissemore;S.T. Millman;S.T. Millman

  • Association of cow and quarter-level factors at drying-off with new intramammary infections during the dry period.

    R.T Dingwell;K.E Leslie;Y.H Schukken;J.M Sargeant

  • Herd-level association of serum metabolites in the transition period with disease, milk production, and early lactation reproductive performance.

    N. Chapinal;S.J. LeBlanc;M.E. Carson;K.E. Leslie

  • Short communication: Haptoglobin as an early indicator of metritis

    J.M. Huzzey;T.F. Duffield;S.J. LeBlanc;D.M. Veira

Frequent Co-Authors

Ken E. Leslie
Ken E. Leslie University of Guelph
Stephen J. LeBlanc
Stephen J. LeBlanc University of Guelph
Kerry D. Lissemore
Kerry D. Lissemore University of Guelph
Brian W. McBride
Brian W. McBride University of Guelph
David F. Kelton
David F. Kelton University of Guelph
Trevor J. DeVries
Trevor J. DeVries University of Guelph
R. Bagg
R. Bagg Eli Lilly (United States)
P. Dick
P. Dick Paul Dick and Associates
Suzanne T. Millman
Suzanne T. Millman Iowa State University
Andrew S. Peregrine
Andrew S. Peregrine University of Guelph

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Related Online Degrees & Career Pathways

For those passionate about studying Animal Science and Veterinary fields, exploring related career paths can provide valuable growth opportunities. The sector intersects with various disciplines, including counseling and therapy, enhancing animal welfare and human-animal interactions.

If you are interested in supporting both animals and their owners, consider programs like accredited online colleges for drug and alcohol counseling. These programs prepare professionals to address behavioral health challenges which can directly impact pet care and rehabilitation settings.

Similarly, online marriage and family therapy masters programs equip students to understand family dynamics, an important aspect when animals are part of family life, helping improve relationships and well-being.

For advanced careers, pursuing a phd in counseling online offers specialized expertise to support mental health challenges that could affect animal handlers, veterinarians, and their clients.

Of course, foundational knowledge from animal degrees remains essential. These programs open doors to diverse roles in animal science, veterinary care, and conservation efforts.

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