Cited by 69Animal Behavior and Welfare StudiesAnimal health and immunologyEffects of Environmental Stressors on Livestock

Invited review: The welfare of young calves transported by road

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Roadknight, Natalie, Mansell, Peter, Jongman, Ellen, Courtman, Natalie, Fisher, Andrew·2021·Journal of Dairy Science

Abstract

The transport of young calves is a welfare concern. Young calves aged ≤3 mo are particularly vulnerable to compromised welfare, and are at a relatively high risk of morbidity and mortality compared with adult cattle. Calves face several potential challenges to welfare during and after transport, including food and water deprivation, disease, injury, and stress from handling, social mixing, and new environments. The key risk factors identified for poor calf welfare associated with transport include long transport and fasting durations, young age at transport, poor colostral immunity, timing within the calving season, lack of bedding in trucks, and high stocking density. Maximizing calf welfare thus requires a multifaceted approach, such as minimizing transport and fasting durations, transporting at an appropriate stocking density with comfortable bedding, only transporting calves that are healthy and fit, and optimizing pre-transport calf management. More research is needed to understand the effect of transport on the mental or affective state of calves.

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Crossref · 10.3168/jds.2020-19346

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  • The risks of severe hunger and thirst, metabolic exhaustion, and dehydration increase with time without feed and water.

    “However, the risks of severe hunger and thirst, metabolic exhaustion, and dehydration increase with time without feed and water (Roadknight et al., 2021).”

    From Relative merits of offering a milk replacer, glucose-electrolyte, or whey-based diet on the blood composition and health of unweaned calves after transport. (2024) · cites this paper as Roadknight et al., 2021

    The Fasting section reports that glucose declines as time off feed increases, that longer fasting can lead to hypoglycemia, and that calves fasted for 24–30 hours are likely hungry. The Dehydration section reports an association between time off feed and a hydration measure, but characterizes dehydration during fasting and transport as generally mild to moderate and says calves may be thirsty. These passages do not establish increasing risks of *severe* hunger or thirst, or of metabolic exhaustion. (LLM, conf=0.85)

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  • Calves that do not receive adequate nutritional support to mitigate the effects of fasting and low body fat reserves are likely to have an increased risk of morbidity.

    “Calves that are not healthy before and during transport have reduced resilience, and those that do not receive adequate nutritional support to mitigate the effects of fasting and low body fat reserves are likely to have an increased risk of morbidity (Roadknight et al., 2021).”

    From Relative merits of offering a milk replacer, glucose-electrolyte, or whey-based diet on the blood composition and health of unweaned calves after transport. (2024) · cites this paper as Roadknight et al., 2021

    The Disease section (page unavailable) reports that longer fasting and transport were linked to higher posttransport morbidity in preweaned veal calves. The Fasting section (page unavailable) notes calves’ low body fat reserves and says nutritional deficiencies may harm health and immune function. The review does not establish that inadequate nutritional support specifically increases morbidity by failing to offset fasting and low fat reserves; it identifies the effect of longer-term nutrition during transport as a research gap. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • Dehydration, weight loss, energy depletion, and exhaustion are commonly reported outcomes of long-distance transport and are accompanied by negative affective states such as hunger and thirst.

    “Dehydration, weight loss, energy depletion, and exhaustion are commonly reported outcomes of long-distance transport (reviewed by [5, 8]) and are accompanied by negative affective states such as hunger and thirst [9, 10].”

    From Effects of age and feeding protocols on the metabolic and physiological condition of unweaned calves during and after long-distance transport (2026) · cites this paper as [5]

    The Dehydration section says mild-to-moderate dehydration and weight loss may be reasonably common during fasting and transport, and calves may be thirsty. The Fasting and Duration and Distance of Transport sections describe negative energy balance, possible hunger, and increased muscle fatigue with longer journeys. They do not establish exhaustion as a commonly reported outcome, and they qualify hunger and thirst as possible rather than confirmed states; the review also notes that weight loss may be due primarily to fasting. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • When young, unweaned calves are transported from dairy farms to calf-raising facilities, especially if the journey includes an auction market, dealer, or collection center, they can be exposed to a range of interrelated potential welfare issues.

    “When young, unweaned calves are transported from dairy farms to calf-raising facilities (especially if the journey includes an auction market, dealer, or collection center), the calves can be exposed to a range of interrelated potential welfare issues (Roadknight et al., 2021).”
  • The concentrations of blood metabolites sampled from the calves after transport to the sorting center were indicative of the effects of fasting during transport and at a market or collection center on the energy status of the calves.

    “The concentrations of blood metabolites sampled from the calves after transport to the sorting center were indicative of the effects of fasting during transport and at a market or collection center on the energy status of the calves (Roadknight et al., 2021).”

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Cites

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1 of the 97 references couldn’t be matched to a known paper.

Research works printed but not linked: 4

  1. Animal Health Australia. 2012. Australian Animal Welfare Stan- dards and Guidelines -Land Transport of Livestock. Edition 1, Version 1.1. Canberra. Accessed June 20, 2017. http: / / www .animalwelfarestandards .net .au/ files/ 2015/ 12/ Land -transport -of -livestock -Standards -and -Guidelines -Version -1 . -1 -21 -September -2012 .pdf.
  2. George, J. W., and S. M. Zabolotzky. 2011. Water, electrolytes, and acid base. Pages 145-171 in Duncan & Prasse's Veterinary Labo- ratory Medicine: Clinical Pathology. 5th ed. K. S. Latimer, ed. Wiley-Blackwell.
  3. Hall, R. L., and H. S. Bender. 2011. Muscle. Pages 283-294 in Duncan & Prasse's Veterinary Laboratory Medicine: Clinical Pathology. 5th ed. K. S. Latimer, ed. Wiley-Blackwell.
  4. New Zealand Government. 2018a. Animal Welfare (Care and Pro- cedures) Regulations 2018. Ministry for Primary Industries. Ac- Roadknight et al.: INVITED REVIEW: WELFARE OF TRANSPORTED CALVES cessed Oct. 29, 2018. http: / / www .legislation .govt .nz/ regulation/ public/ 2018/ 0050/ latest/ whole .html.

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Authors
Roadknight, N., Mansell, P., Jongman, E., Courtman, N., & Fisher, A.
Affiliations
The University of Melbourne (AU)
Corresponding author
Roadknight, Natalie
Venue
Journal of Dairy Science
Published
2021-06
Volume
104
Issue
6
Pages
6343-6357
ISSN
0022-0302 (ISSN-L)
OpenAlex
W3136726205
Cited by
63
References
97
Citations by year
2026: 13 · 2025: 12 · 2024: 21 · 2023: 12 · 2022: 4 · 2021: 1
FWCI
2.18
Type
journal article
Language
en
Open access
Locations
  • Journal of Dairy Science (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Australian Government
  • Meat and Livestock Australia
  • Massey University
Topics
  • Health Sciences › Veterinary › Small Animals › Animal Behavior and Welfare Studies
  • Health Sciences › Veterinary › Small Animals › Animal health and immunology
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Effects of Environmental Stressors on Livestock
Keywords
calf welfare, road transport, young calves, transport stress, fasting duration, colostral immunity, stocking density, bedding, morbidity and mortality, social mixing, affective states
MeSH terms
Animals, Animal Welfare, Cattle, Cattle Diseases, Colostrum, Female, Morbidity, Pregnancy, Risk Factors, Seasons

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