Cited by 119Animal health and immunologyAnimal Behavior and Welfare StudiesEffects of Environmental Stressors on Livestock

Risk factors associated with mortality at a milk-fed veal calf facility: A prospective cohort study

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Renaud, D.L., Duffield, T.F., LeBlanc, S.J., Ferguson, S., Haley, D.B., Kelton, D.F.·2018·Journal of Dairy Science

Abstract

The veal industry experiences calf losses during the growing period, which represents a challenge to animal welfare and profitability. Health status at arrival may be an important predictor of calf mortality. The objectives of this prospective cohort study were to describe the health status of calves arriving at a veal farm and determine the risk factors associated with early and late mortality. Using a standardized health scoring system, calves were evaluated immediately at arrival to a commercial milk-fed veal facility in Ontario, Canada. Weight at arrival and supplier of the calf were recorded. The calves were followed until death or the end of their production cycle. Two Cox proportional hazard models were built to explore factors associated with early (≤21 d following arrival) and late mortality (>21 d following arrival). A total of 4,825 calves were evaluated from November 2015 to September 2016. The overall mortality risk was 7%, with 42% of the deaths occurring in the first 21 d after arrival. An abnormal navel, dehydration, housing location within the farm, arriving in the summer, and the presence of a sunken flank were associated with increased hazard of early mortality. Drover-derived calves and calves with a greater body weight at arrival had lower hazard of early mortality. Housing location within the farm, being derived from auction facilities, and an abnormal navel were associated with higher hazard of late mortality. These results demonstrate that risk factors for mortality can be identified at arrival, which represents a potential opportunity to selectively intervene on these calves to reduce mortality. However, methods of preventing the development of these conditions before arrival need to be explored and encouraged to improve the welfare of the calves entering the veal industry.

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  1. Dohoo, I., W. Martin, and H. Stryhn. 2010a. Model-building strate- gies. Pages 365-394 in Veterinary Epidemiological Research. 2nd ed. VER Inc., Charlottetown, Prince Edward Island, Canada.
  2. Dohoo, I., W. Martin, and H. Stryhn. 2010c. Screening and diagnostic tests. Pages 91-134 in Veterinary Epidemiological Research. 2nd ed. VER Inc., Charlottetown, Prince Edward Island, Canada.

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Authors
Renaud, D. L., Duffield, T. F., LeBlanc, S. J., Ferguson, S., Haley, D. B., & Kelton, D. F.
Affiliations
University of Guelph (CA)
Corresponding author
Kelton, D.F.
Venue
Journal of Dairy Science
Published
2018-03
Volume
101
Issue
3
Pages
2659-2668
ISSN
0022-0302 (ISSN-L)
OpenAlex
W2777949064
Cited by
118
References
62
Citations by year
2026: 15 · 2025: 11 · 2024: 16 · 2023: 22 · 2022: 21 · 2021: 10 · 2020: 11 · 2019: 7 · 2018: 5
FWCI
9.91
Type
journal article
Language
en
Open access
Locations
  • Journal of Dairy Science (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Dairy Farmers of Ontario
  • Ontario Ministry of Agriculture, Food and Rural Affairs
  • Ministry of Agriculture, Food and Rural Affairs
Topics
  • Health Sciences › Veterinary › Small Animals › Animal health and immunology
  • Health Sciences › Veterinary › Small Animals › Animal Behavior and Welfare Studies
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Effects of Environmental Stressors on Livestock
Keywords
veal calves, calf mortality, risk factors, dehydration, housing location, early mortality, late mortality, animal welfare
MeSH terms
Animals, Animal Husbandry, Animal Welfare, Body Weight, Cattle, Cattle Diseases, Health Status, Male, Meat, Ontario, Prospective Studies, Risk Factors, Seasons, Proportional Hazards Models, Food Industry

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