Full Text Journal Articles by
Author J H C Costa

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Associations between feeding behaviors collected from an automated milk feeder and disease in group-housed dairy calves in Ontario: A cross-sectional study.

M H Conboy, C B Winder, C Medrano-Galarza, S J LeBlanc, D B Haley, J H C Costa, M A Steele, D L Renaud,

The adoption of automated milk feeders and group housing of preweaning dairy calves has become more common in Canada; however, disease detection in group-housed calves remains a challenge. The aim of this cross-sectional study was to assess whether feeding behavior data collected from a single point in time could be ... Read more >>

J Dairy Sci (Journal of dairy science)
[2021, :]

Cited: 0 times

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Nutraceutical intervention with colostrum replacer: Can we reduce disease hazard, ameliorate disease severity, and improve performance in preweaned dairy calves?

M C Cantor, D L Renaud, J H C Costa,

The objective of this randomized clinical trial was to determine if an intervention with colostrum replacer (CR; Premolac Plus, Zinpro; 125 g/d fed for 3 d) or a placebo milk replacer (Cows Match, Land O'Lakes Inc.; 125 g/d for 3 d) following a triggered alarm could ameliorate disease bouts in ... Read more >>

J Dairy Sci (Journal of dairy science)
[2021, 104(6):7168-7176]

Cited: 0 times

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Technical note: Evaluation of a commercial on-farm milk leukocyte differential tester to identify subclinical mastitis cases in dairy cows.

I Robles, D T Nolan, C A Fendley, H L Stokley, T L France, J L Ferrell, J H C Costa,

The objective of this study was to validate the precision and accuracy of a milk leukocyte differential tester to identify subclinical mastitis cases in dairy cows. Milk samples from individual quarters (n = 320) of 80 Holstein cows were aseptically collected and analyzed in this study. Each sample was divided ... Read more >>

J Dairy Sci (Journal of dairy science)
[2021, 104(4):4942-4949]

Cited: 0 times

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Identification of biomarkers measured upon arrival associated with morbidity, mortality, and average daily gain in grain-fed veal calves.

H M Goetz, D F Kelton, J H C Costa, C B Winder, D L Renaud,

There is a strong need for management strategies that help reduce the incidence of disease and subsequent antimicrobial use in the veal industry. Biomarkers could serve as useful tools that allow producers to take preventative measures before clinical problems occur. The objective of this prospective cohort study was to identify ... Read more >>

J Dairy Sci (Journal of dairy science)
[2021, 104(1):874-885]

Cited: 1 time

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A comprehensive evaluation of microchips to measure temperature in dairy calves.

M M Woodrum Setser, M C Cantor, J H C Costa,

Elevated temperature is often an indicator of an immune response and used in the diagnosis of illness in dairy calves; however, measuring rectal temperature is labor intensive and often not measured daily on the farm. The objective of this study was to measure body temperature using a microchip and determine ... Read more >>

J Dairy Sci (Journal of dairy science)
[2020, 103(10):9290-9300]

Cited: 1 time

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Automatic weaning based on individual solid feed intake: Effects on behavior and performance of dairy calves.

J B Benetton, H W Neave, J H C Costa, M A G von Keyserlingk, D M Weary,

Calves are typically weaned from milk to solids once they reach a predetermined age or when they are consuming a predetermined intake of solids. The first aim of this study was to compare feeding behavior and performance of calves weaned based on age versus starter intake. The latter method can ... Read more >>

J Dairy Sci (Journal of dairy science)
[2019, 102(6):5475-5491]

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Technical note: Validation of a behavior-monitoring collar's precision and accuracy to measure rumination, feeding, and resting time of lactating dairy cows.

L N Grinter, M R Campler, J H C Costa,

Precision dairy technology is important because of the possibility to continuously and accurately measure behavior, biometrics, and productivity on commercial and research dairy farms by an automated method with minimal human intervention. The behavior-monitoring collar (BMC) used in this study is a commercially available precision dairy technology (MooMonitor+, Dairymaster, Co. ... Read more >>

J Dairy Sci (Journal of dairy science)
[2019, 102(4):3487-3494]

Cited: 5 times

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Corrigendum to "The effect of milk allowance on behavior and weight gains in dairy calves" (J. Dairy Sci. 100:504-512).

K Rosenberger, J H C Costa, H W Neave, D M Weary, M A G von Keyserlingk,

J Dairy Sci (Journal of dairy science)
[2017, 100(4):3327]

Cited: 0 times

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The effect of milk allowance on behavior and weight gains in dairy calves.

K Rosenberger, J H C Costa, H W Neave, M A G von Keyserlingk, D M Weary,

The objective of this study was to investigate how milk allowance affects body weight gains and behavior before, during, and after weaning in dairy calves. Fifty-six Holstein calves were randomly assigned at 1wk of age to 1 of 4 feeding treatments of whole pasteurized milk: 6, 8, 10, or 12 ... Read more >>

J Dairy Sci (Journal of dairy science)
[2017, 100(1):504-512]

Cited: 25 times

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Invited review: Effects of group housing of dairy calves on behavior, cognition, performance, and health.

J H C Costa, M A G von Keyserlingk, D M Weary,

Standard practice in the dairy industry is to separate the calf and dam immediately after birth and raise calves in individual pens during the milk-feeding period. In nature and in extensive beef systems, the young calf lives in a complex social environment. Social isolation during infancy has been associated with ... Read more >>

J Dairy Sci (Journal of dairy science)
[2016, 99(4):2453-2467]

Cited: 33 times

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Dairy heifers benefit from the presence of an experienced companion when learning how to graze.

J H C Costa, W G Costa, D M Weary, L C P Machado Filho, M A G von Keyserlingk,

Pasture remains important on many dairy farms, but the age of first contact with pasture varies depending on the month of birth, weaning age, and farm management. Regardless of age, naïve dairy heifers must learn to graze when first introduced to pasture. This study investigated whether being grouped with experienced ... Read more >>

J Dairy Sci (Journal of dairy science)
[2016, 99(1):562-568]

Cited: 9 times

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Early pair housing increases solid feed intake and weight gains in dairy calves.

J H C Costa, R K Meagher, M A G von Keyserlingk, D M Weary,

Dairy calves have traditionally been kept in individual pens throughout the milk-feeding period. Social rearing is associated with increased solid feed intake and, hence, higher weight gains before and after weaning. Little is known about the effect of the age at which social housing begins. The aim of this study ... Read more >>

J Dairy Sci (Journal of dairy science)
[2015, 98(9):6381-6386]

Cited: 29 times

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Complex social housing reduces food neophobia in dairy calves.

J H C Costa, R R Daros, M A G von Keyserlingk, D M Weary,

Animals are often reluctant to consume novel feeds. Research suggests that social housing can reduce fearfulness in animals. The aim of this study was to test the prediction that social housing reduces food neophobia in dairy calves. Beginning immediately at birth, Holstein bull calves were either reared individually (n=18) or ... Read more >>

J Dairy Sci (Journal of dairy science)
[2014, 97(12):7804-7810]

Cited: 26 times

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A survey of management practices that influence production and welfare of dairy cattle on family farms in southern Brazil.

J H C Costa, M J Hötzel, C Longo, L F Balcão,

A survey on dairy production in family dairy farms in the northwest of Santa Catarina, Brazil, was carried out to assess husbandry practices and elements of the living environment that may influence animal welfare and productivity. Three farm systems common in the region were compared: extensive, pasture-based, and semi-intensive. Data ... Read more >>

J Dairy Sci (Journal of dairy science)
[2013, 96(1):307-317]

Cited: 22 times

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