Journal of the Japan Veterinary Medical Association
Online ISSN : 2186-0211
Print ISSN : 0446-6454
ISSN-L : 0446-6454
Effects of Hoof Trimming on Hematological and Biochemical Variables during Transport-induced Stress in Japanese Black Cattle
Kazuhiro MISUMITakeshi SHINSATOOsamu AOKIKentaroh SETOYAMANaoki MIURAKohichi YANAGITAHiroshi SAKAMOTO
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2001 Volume 54 Issue 11 Pages 837-840

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Abstract

The purpose of this study is to determine effects of hoof trimming on transport-induced stress in beef cattle. Forty-one Japanese black steers were randomly divided into 2 groups: trimmed group (n=27) and untrimmed group (n=14). In the trimmed group, hoof trimming was repeated every 6 months, with the final trimming performed 3 months before shipment. The untrimmed group was not trimmed at all until shipment time. Before and after truck transportation to the shipping destination (57.8 km, 4 hours), the cattle were weighed, and their blood was sampled for hematological and biochemical analysis. The indices of transport-induced stress were creatine phosphokinase (CK) and cortisol. In both groups, CK and cortisolincreased after transportation. Increase in the parameters was lower in the trimmed group than in the untrimmed group. Lower CK activity in the trimmed group suggests that the physical demand for posture support during transport in the vehicle was more restricted in thetrimmed group. Plasma cortisol increased less in the trimmed group than in the untrimmed group. This could mean that periodical trimming effectively inhibits transport-induced stress in beef cattle.

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