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Performance and blood chemistry in lambs following fasting and transport

Published online by Cambridge University Press:  02 September 2010

G. M. J. Horton ,
J. A. Baldwin ,
S. M. Emanuele ,
J. E. Wohlt  and
L. R. McDowell
G. M. J. Horton
Affiliation:
Department of Animal Science, Cook College, Rutgers University, New Brunswick, NJ 08903, USA
J. A. Baldwin
Affiliation:
Department of Animal Science, Cook College, Rutgers University, New Brunswick, NJ 08903, USA
S. M. Emanuele
Affiliation:
Department of Animal Science, Cook College, Rutgers University, New Brunswick, NJ 08903, USA
J. E. Wohlt
Affiliation:
Department of Animal Science, Cook College, Rutgers University, New Brunswick, NJ 08903, USA
L. R. McDowell
Affiliation:
University of Florida, Gainesville, FL32611, USA
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Abstract

Thirty-six 5-month-old Dorset ram lambs (28·7 kg) were used to investigate the effects of fasting and transport on performance and selected blood parameters. Three treatment groups (no. = 12) were: (1) control-food and water, without transport; (2) fasting for 72 h, without transport; and (3) transport in a trailer to a nearby auction-barn, then driven 8 h/day for 3 days without food or water for a total of 72 h. Lambs were given a total mixed diet containing 163 g/kg crude protein throughout the 28-day post-transport period. Both fasted and transported lambs consumed less food than the control group during the first 7 days post treatment (P < 0·05). Water intake was similar for all treatment groups on the 1st day post transport, after which both fasted and transport lambs drank less ivater than control lambs during the following 6 days (P < 0·05). Live-weight loss after the 3-day fast and transport period and subsequent body-weight gain during the 28-day realimentation period differed across all treatment groups (P < 0·05 and P < 0·09; (1) 1% and 305 g, (2) 14·8% and 343 g, and (3) 20·0% and 390 g, respectively, though control lambs had the highest weight gains over the 32-day experimental period. Plasma urea nitrogen was lower in both fasted and transported lambs on days 6, 7 and 11 compared with control lambs (P < 0·05). Plasma glucose concentrations on days 4 and 5 were lower in transported lambs than in fasted lambs, and highest in control lambs (P < 0·05); glucose concentration levels remained lower in both fasted and transported lambs than in control lambs on days 6 and 7 (P < 0·05). Plasma cortisol concentrations were highest in transported lambs during the 3-day transport period and for 2 days immediately following transport (P < 0·05). Effects of the 72 h fast were exacerbated by auction barn activity and subsequent transport, and compensatory gains by fasted and transport lambs were incomplete within the 28-day post transport period.

Keywords

fastingsheepstresstransport
Type
Research Article
Information
Animal Science , Volume 62 , Issue 1 , February 1996 , pp. 49 - 56
Copyright
Copyright © British Society of Animal Science 1996

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