A method includes the steps of recording milk yields (MY?1#191, MY?2#191, MY?N#191) from milkings of an udder quarter or udder of a milking animal; recording the times (t.sub.1, t.sub.2, . . . , t.sub.N) of the milkings; calculating milk secretion rates (MSR.sub.1, MSR.sub.2, . . . , MSR.sub.N) for said udder quarter or udder based on the milk yields and times; fitting a time dependent function (F(t)) to the calculated secretion rates, said time dependent function comprising one portion, which increases with time, and one portion, which decreases with time; estimating an expected milk secretion rate (EMSR.sub.t1+N) for said udder quarter or udder at a time (t.sub.N+1) following the last milking based on said function (F(t)); determining an expected milk yield (EMY.sub.tN+1) for said udder quarter or udder at said time based on the expected secretion rate and, at said time, the time period lapsed since last milking; and initiating an action to be performed with respect to said animal depending on said expected milk yield.