Abstract: A method and arrangement for determining a gut fill level of the rumen of an animal uses a three-dimensional camera and an image processing system. The three-dimensional camera is located in a station, wherein the animal is forced to stand essentially still during recording of the three-dimensional image. The three-dimensional camera is located on the left side of the animal at a height above the rumen triangle of the animal, longitudinally in essence in level with the rumen triangle, and is directed downwards towards the rumen triangle during the image recording. The image processing system automatically determines a depth and/or volume of a convexity or concavity of the rumen triangle, and determines the gut fill level of the rumen of the animal based on the determined depth and/or volume.

Abstract: A method and arrangement for determining a gut fill level of the rumen of an animal uses a three-dimensional camera and an image processing system. The three-dimensional camera is located in a station, wherein the animal is forced to stand essentially still during recording of the three-dimensional image. The three-dimensional camera is located on the left side of the animal at a height above the rumen triangle of the animal, longitudinally in essence in level with the rumen triangle, and is directed downwards towards the rumen triangle during the image recording. The image processing system automatically determines a depth and/or volume of a convexity or concavity of the rumen triangle, and determines the gut fill level of the rumen of the animal based on the determined depth and/or volume.

Abstract: 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 (t1, t2, . . . , tN) of the milkings; calculating milk secretion rates (MSR1, MSR2, . . . , MSRN) 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 (EMSRt1+N) for said udder quarter or udder at a time (tN+1) following the last milking based on said function (F(t)); determining an expected milk yield (EMYtN+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.