The optimum prep lag time has been the focus of research (Rasmussen et al., 1992). The prep lag time is defined as the time from the beginning of teat preparation to attachment of the milking unit (Reneau and Chastain, 1995). The Lactocorder~R is an instalment that measures the milk flow rate, yield and duration of milking, It is inserted between the milking unit and milk pipeline by milk hose. It has been suggested that the Lactocorder can be used as a diagnostic tool for evaluating milking procedure problems (Wallace et al., 2003). The objective of this study was to determine if the Lactocorder~R could detect differences in milk flow curves based upon the use of 3 different premilking cow preparation procedures.
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