A system for automatically determining pregnancy toxaemia in at least one animal 10 in agroup of animals comprises a sensor 50 for obtaining at least one value representative of a liquid or water uptake of the at least one animal, said sensor being adapted to bepositioned in the vicinity of a liquid or water supply station 20 or on the at least one animal. A processing unit 70 is provided, which is configured for comparing the obtained at least one value representative of a liquid or water uptake of the at least one identified animal to a threshold value, the threshold value being representative of an average of the at least one value for the group of animals； and for generating a signal and/or alert when the obtained atleast one value exceeds the threshold value. A water supply station 20, and a water dispenser (300, fig 3) are also claimed. The animal may be a pregnant sheep or doe.
