Behavioural indicators of hunger in dairy calves

Vieira, Andreia De Paula; Guesdon, Vanessa; Passillé, A.M. de; Keyserlingk, M.A.G. von; Weary, Daniel M.

doi:10.1016/j.applanim.2007.03.006

Cited by 179 publications

(84 citation statements)

References 30 publications

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“…Pre-weaning MR intakes reported here are similar to other reports where calves were offered unlimited quantities of [3] [4] [7] [20]. Daily MR intake by calves assigned to the ACID feeding treatment was approximately 1 L/day less than that of NON calves.…”

Section: Discussionsupporting

confidence: 77%

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Milk Replacer Acidification for Free-Access Feeding: Effects on the Performance and Health of Veal Calves

Todd¹,

Leslie²,

Millman³

et al. 2016

OJAS

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Objectives of this study were to investigate the effects of milk replacer (MR) acidification for freeaccess feeding on pre-and post-weaning performance, morbidity and mortality of calves. Calves were randomly assigned to free-access feeding of acidified (ACID, n = 31) or non-acidified (NON, n = 31) MR, and weaned at 42 days. ACIDMR was prepared to pH 4.0 -4.5 using formic acid. Intakes were measured daily and weights weekly. Samples of ACID and NON MR were analyzed for coliform and aerobic bacterial growth. After weaning, calves transitioned to a grain-fed veal diet, weighed every 2 weeks. At slaughter (approximately 6 months of age), lungs were evaluated for gross pathological changes and dressed carcass weights were obtained. Generalized linear mixed models were constructed to examine the effects of MR acidification. Differences by treatment group for pre-and post-weaning morbidity and mortality were tested using Pearson's χ 2 and Fisher's exact tests. ACID calves consumed less MR than NON (10.6 vs. 11.7 L/d, P = 0.02). Acidification tended to promote earlier onset of starter ration consumption (32.0 vs. 39.5 d, hazard ratio = 1.5, P = 0.07), but did not affect average daily starter ration or water intakes across the preweaning period. ACID and NON calves did not differ for BW at weaning, pre-or post-weaning ADG or dressed carcass weight. ACID MR had less coliform (P < 0.001) and aerobic bacterial growth (P < 0.001) than NON MR, but odds of disease treatment and mortality did not differ. ACID calves tended to have lower odds of pulmonary lesions during post-mortem inspection than NON calves (OR = 0.3, P = 0.07). These results indicate that under free-access feeding conditions, acidification * Corresponding author. C. G. Todd et al. 235limited bacterial growth and MR intake, but there were no long-term impacts of acidification on calf performance or health. In conclusion, acidification to pH 4.0 -4.5 will significantly reduce bacterial growth in milk fed to calves.

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Section: Discussionsupporting

confidence: 77%

“…With these feeding systems, milk is available continuously allowing calves to feed ad libitum and to have greater control over their feeding behavior [3] [4]. In contrast, traditional feeding methods restrict milk intake, resulting in lower feed efficiency, reduced growth, hunger and reduced calf welfare [5]- [7].…”

Section: Introductionmentioning

confidence: 99%

Milk Replacer Acidification for Free-Access Feeding: Effects on the Performance and Health of Veal Calves

Todd¹,

Leslie²,

Millman³

et al. 2016

OJAS

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“…The calves in our experiment received limited amount of milk daily, and this restricted feeding has been reported to induce hunger in the study of Vieira et al [26]. They indicated that milk-restricted calves were more active and performed more unrewarded visits to feeders than calves fed ad libitum.…”

Section: Oral Activitymentioning

confidence: 64%

Artificial Grooming during Early Life could Boost the Activity and Human Affinity of Holstein Female Calves

Li¹,

Wang²,

Jin³

et al. 2020

Animals

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Early cow–calf separation management induced various welfare problems for dairy calves. We mimicked the maternal licking by manually brushing right after the Holstein female calves were born and during their first week of life, termed artificial grooming (AG). The behavior of these treated calves (AG, n = 17) was compared with the calves without artificial grooming (Con, n = 16) during daily behavioral observation around evening milk feeding and in the open field test (OFT) and novel human test (NHT). The number of calves ingesting starter on day six was recorded. The AG calves were observed to be more active and perform more oral behavior compared with the Con calves around evening milk feeding. In the OFT and NHT, the AG calves were again more active than the Con calves. Moreover, the AG calves tended to be less cautious and had more human interactions than the Con calves in the NHT. There tended to be a higher percentage of AG calves ingesting starter on day 6. In conclusion, artificial grooming during early life could boost the activity and the human affinity of female calves and it might advance their starter diet ingestion.

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“…Instead of housing calves individually, now we know, through controlled studies, that disease transmission can be prevented or mitigated through better colostrum management on farms. Furthermore, socially housed calves, when fed higher milk volumes via a teat and gradually weaned off milk to starter and forage, transition more smoothly to a solid diet, gain more weight and produce more milk [31][32][33]. These studies give veterinary epidemiologists a basis on which to perform future comparative studies aimed at improving dairy cattle husbandry and health.…”

Section: One Health: Disease Prevention and Animal Welfarementioning

confidence: 99%

Recalibrating Veterinary Medicine through Animal Welfare Science and Ethics for the 2020s

Vieira

Anthony

2020

Animals

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Simple Summary: This article emphasizes the importance of educating veterinarians and veterinary students in animal welfare science and veterinary ethics, so that they can ably advance pertinent scientific knowledge and promote ethical thinking as trusted animal advocates in the 2020s. In light of this public expectation, a number of challenges are raised for veterinarians and the veterinary profession. These challenges involve: (1) re-envisioning the nature of disease treatment that goes beyond traditional conceptions of health or clinical matters, and which include animal welfare; (2) re-imagining disease prevention at the intersection of animal-human-ecosystem health;(3) developing core competencies in animal welfare science and ethics in order to provide professional leadership in animal welfare; and (4) taking a more active role in the development of novel networked devices, monitoring technologies and automated animal welfare solutions, and understanding their effects on the welfare of animals, human-animal relationships, and the veterinary profession in general.Abstract: What should leading discourses and innovation regarding animal welfare look like for the veterinary profession in the 2020s? This essay considers four main challenges into which veterinarians are increasingly being drawn, as they respond to increasing public expectation for them to be scientific and moral authorities in animal welfare in addition to their traditional role as trusted health experts. They include: (1) to go beyond traditional conceptions of health by adopting a holistic view that also considers animal welfare, not only disease treatment; (2) to reimagine their professional duties when it comes to disease prevention at the intersection of animal-human-ecosystem health; (3) to develop core competencies/proficiency in animal welfare science and ethics in order to navigate discourses concerning competing priorities and socio-political ideologies and to provide professional leadership in animal welfare; (4) to provide feedback on novel networked devices, monitoring technologies and automated animal welfare solutions and their impact on animals' welfare. To competently navigate the intricacies of the socio-political and connected world as trusted authorities and conduits for innovation in and through animal welfare, veterinarians and veterinary students are encouraged to: (a) develop core competencies in veterinary ethics, animal welfare science and deliberative capacities that are well-informed by current multidisciplinary frameworks, such as One Health; (b) engage interested parties in more effective collaboration and ethical decision-making in order to address animal welfare related concerns within their immediate sphere of influence (e.g., in a given community); and (c) participate in the process of engineering and technological design that incorporates animals' welfare data (such as their preferences) for real-time animal monitoring through adding animal scientific and values-aware evidence in information technology systems. ...

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Behavioural indicators of hunger in dairy calves

Cited by 179 publications

References 30 publications

Milk Replacer Acidification for Free-Access Feeding: Effects on the Performance and Health of Veal Calves

Milk Replacer Acidification for Free-Access Feeding: Effects on the Performance and Health of Veal Calves

Artificial Grooming during Early Life could Boost the Activity and Human Affinity of Holstein Female Calves

Recalibrating Veterinary Medicine through Animal Welfare Science and Ethics for the 2020s

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