Pre-slaughter mortality and post-slaughter wastage in bobby veal calves at a slaughter premises in New Zealand

Thomas, G W; Jordaan, Pierre

doi:10.1080/00480169.2012.734374

Cited by 21 publications

(13 citation statements)

References 23 publications

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“…In a veal calf system, Pardon et al 8 recorded an incidence of 0.01 omphalitis cases per 1000 calf days at risk. Thomas and Jordaan 9 reported omphalitis as the main reason for preslaughter mortality in 23 per cent of calves. According to the same authors, omphalitis was also the most common cause of postslaughter wastage (97 out of 180 calves, i.e., 54 per cent of condemned carcases).…”

Section: Introductionmentioning

confidence: 99%

Development of clinical sign‐based scoring system for assessment of omphalitis in neonatal calves

Steerforth

Winden

2018

Veterinary Record

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Omphalitis contributes significantly to morbidity and mortality in neonatal calves. Diagnosis of omphalitis is based on the local signs of inflammation-pain, swelling, local heat and purulent discharge. An abattoir trial identified an optimal, sign-based, scoring system for diagnosis of omphalitis. A sample of 187 calves aged between 7 and 15 days old were clinically examined for signs of umbilical inflammation and compared with postmortem examination of navels. On postmortem findings, 64 calves (34.2 per cent) had omphalitis. In the examined omphalitis cases, the most commonly affected umbilical structure was the urachus (78.1 per cent). Multivariable logistic regression revealed that thickening of the umbilical stump over 1.3 cm (P<0.001), discharge (P<0.001), raised local temperature (P=0.003) and the presence of umbilical hernia (P=0.024) were correlated and positive predictors of omphalitis. Discharge from the umbilical stump was associated with intra-abdominal inflammation (P=0.004). Assigning weights based on the multivariable logistic regression coefficients, a clinical scoring algorithm was developed. The cumulative score ranged from 0 to 9. Using this scoring system, calves were categorised as positive if their total score was ≥2. This scoring method had a sensitivity of 85.9 per cent, specificity of 74.8 per cent and correctly classified 78.6 per cent of all calves.

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Section: Introductionmentioning

confidence: 99%

Development of clinical sign‐based scoring system for assessment of omphalitis in neonatal calves

Steerforth

Winden

2018

Veterinary Record

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“…Surplus dairy-breed calves from the dairy industry are typically processed for beef at less than 2 weeks of age [2][3][4][5]. There is an opportunity to repurpose the surplus calves born every year by using beef-breed bulls to sire the calves and rearing the calves for beef production, alleviating welfare concerns around the fate of these surplus calves.…”

Section: Introductionmentioning

confidence: 99%

Sire Effects on Birth Weight, Gestation Length, and Pre-Weaning Growth of Beef-Cross-Dairy Calves: A Case Study in New Zealand

Coleman

Back

Blair

et al. 2021

Dairy

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Production of beef-cross-dairy calves from dairy cows increases the value of non-replacement calves born to the dairy herd. The use of beef-breed sires may impact on calf birth weight, gestation length and pre-weaning growth rate of calves, which in turn influences the profitability of the dairy farm. The aim of this case study was to compare the birth weight, gestation length, and pre-weaning growth of progeny born to mixed-aged dairy cows on a single farm which were artificially bred to a selection of Angus and Hereford bulls, typical of those used over dairy herds in New Zealand. The birth weight, gestation length and pre-weaning growth of 980 calves sired by 65 sires were compared. Mean progeny birth weight (range 33.3–41.4 kg), gestation length (range 276.1–288.6 days), age at weaning (range 70.3–88.3 days) and pre-weaning ADG (range 0.63–0.76 kg/d) differed among sires (p < 0.001). There was a negative genetic correlation (−0.31) and positive phenotypic correlation (0.36) between gestation length and birth weight. Age at weaning was negatively correlated with birth weight (genetic: −0.56, phenotypic: −0.57). Bulls used in this study, and other bulls with similar genetic merit for birth weight and gestation length would be suitable for mating mixed-aged dairy cows in New Zealand.

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“…Studies evaluating mortality looked at either short-or long-term death loss. Mortality was defined as either dead on arrival to an abattoir (n = 2; Boulton et al, 2020;Thomas and Jordaan, 2013), condemned on arrival or in yard at the processing premises (e.g., weak, recumbent, thin body condition; n = 1; Boulton et al, 2020), euthanized at antemortem examination (n = 1; Thomas and Jordaan, 2013), dead soon after arrival to an abattoir (n = 2; Cave et al, 2005;Boulton et al, 2020), or in longer term studies, within 10 d (n = 1; Chibisa et al, 2018), 4 wk (n = 1; Staples and Haugse, 1974), or 60 d after transportation (n = 1; Barnes et al, 1975).…”

Section: Outcomes Assessedmentioning

confidence: 99%

Characterizing the literature surrounding transportation of young dairy calves: A scoping review

Goetz

Winder

Costa

et al. 2022

Journal of Dairy Science

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Pre-slaughter mortality and post-slaughter wastage in bobby veal calves at a slaughter premises in New Zealand

Cited by 21 publications

References 23 publications

Development of clinical sign‐based scoring system for assessment of omphalitis in neonatal calves

Development of clinical sign‐based scoring system for assessment of omphalitis in neonatal calves

Sire Effects on Birth Weight, Gestation Length, and Pre-Weaning Growth of Beef-Cross-Dairy Calves: A Case Study in New Zealand

Characterizing the literature surrounding transportation of young dairy calves: A scoping review

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