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Published online by Cambridge University Press: 27 March 2009
Sebum was collected from pre-cleaned areas on the skin of Ayrshire calves at a fixed time using a cup and solvent technique, extracted and weighed. The rate of sebum output decreased with time and after 18 h there was very little increase in the weight of sebum on the skin surface. Sebum output over a period of 3 h was not statistically different between animals of different ages but tended to be higher in castrated males than in females and was lower in winter than throughout the remainder of the year.