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Journal of Dairy Science Vol. 68 No. 11 3062-3066
© 1985 by American Dairy Science Association ®
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Effects of Stress from Electrical Dehorning on Feed Intake, Growth, and Blood Constituents of Holstein Heifer Calves1

S. A. Laden, J. E. Wohlt, P. K. Zajac and R. V. Carsia2

Cook College, Rutgers—The State University, New Brunswick, NJ 08903

ABSTRACT

Eighteen Holstein heifer calves were allotted to two groups. Calves in one group were dehorned electrically at 8 wk of age whereas the control group remained horned through 12 wk of age. Feed intake and growth rate did not differ between the two groups. Blood constituents varied with age, nutrition of calf, and dehorning. Dehorning influenced cortisol in blood plasma with high concentrations (25 versus 6 ng/ml) measured for 1 h after dehorning. Electrical dehorning at 8 wk of age presents no long-term stress to calves.

FOOTNOTES

1 New Jersey Agric. Exp. Stn., Pub. No. D-06105-1-84. Supported by State and Hatch Funds.

2 Department of Animal Sciences.






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