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Please use this identifier to cite or link to this item: http://hdl.handle.net/11019/551

Title: Rearing calves outdoors with and without calf jackets compared with indoor housing on calf health and live-weight performance
Authors: Earley, Bernadette
Murray, Margaret
Farrell, J.A.
Nolan, Marie-Jean
Keywords: Calf health
Calf welfare
Calves
Immune function
Interferon-γ
Issue Date: 2004
Publisher: Teagasc (Agriculture and Food Development Authority), Ireland
Citation: B. Earley, M. Murray, J.A. Farrell, M. Nolan. Rearing calves outdoors with and without calf jackets compared with indoor housing on calf health and live-weight performance. Irish Journal of Agricultural and Food Research 43: 59–67, 2004.
Series/Report no.: Irish Journal of Agricultural and Food Research;vol 43
Abstract: The objective of this study was to compare the effects of rearing calves outdoors, with and without all-weather calf jackets, with calves reared indoors on calf immunity and animal performance. In February 1999, male Holstein calves (mean (s.e.) weight 55 (1.90) kg) were randomly assigned to one of three treatments (n=30 per treatment): 1) outdoors with jacket, (J; mean age 19 (s.e. 2.0) days); 2) outdoors without jacket (NJ; mean age 19 (s.e. 1.8) days), and 3) indoors on straw (I; mean age 19 (s.e. 1.0) days). Calves received an individual allowance of 25 kg of milk replacer dry matter during the first 42 days with ad libitum access to a concentrate ration from day 0 to 63. The jackets were removed from the calves on day 42. Live-weight gain from day 0 to day 63 of the study was not significantly different between treatments (J, 0.79; NJ, 0.80; I, 0.80 kg). Sixty percent of the J calves and 53% of the NJ calves required four or more antibiotic treatments for respiratory disease while corresponding treatments were required for 97% of the I calves. The incidence of diarrhoea was significantly higher in both outdoor treatments compared to the I treatment. There was no significant difference in white blood cell counts or in serum immunoglobulin concentrations between treatments on days 0, 21, 42 and 63 or in in vitro interferon-γ production on day 63. It is concluded that using calf jackets on calves reared outdoors had no beneficial effect on calf performance or immune status. The incidence of respiratory disease was higher and diarrhoea incidence was lower in calves reared indoors compared with calves reared outdoors. There was no significant difference in incidences of diarrhoea and respiratory disease between the two outdoor treatments.
Description: peer-reviewed
URI: http://hdl.handle.net/11019/551
http://www.teagasc.ie/research/journalarchives/vol43no12004fullpdfs.asp
ISSN: 0791-6833
Appears in Collections:Animal & Bioscience
IJAFR, volume 43, 2004

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