A feeding system for supplying livestock having: • a water connection, • a storage container for milk replacer, • a whole milk tank, • a mixing container in which a feeding portion can be mixed, • an agitator arranged in the mixing container, • a whole milk supply apparatus with which whole milk from the whole milk tank can be supplied to the mixing container, wherein the whole milk supply apparatus comprises a milk delivery pump • a milk exchanger supply apparatus with which milk replacer from the storage container can be supplied to the mixing container, • a water supply apparatus with which water from the water connection can be supplied to the mixing container, • an electronic control which is connected to the agitator, the whole milk supply apparatus, the milk replacer supply apparatus and the water supply apparatus, • wherein the electronic control is designed to mix a feeding portion by actuating the whole milk supply apparatus, the milk replacer supply apparatus, the water supply apparatus as well as the agitator, characterized in that • the feeding system has a sensor for ascertaining a quantity of whole milk contained in the whole milk tank, wherein the electronic control is connected to the sensor, • the electronic control is designed to determine a whole milk dosing quantity on the basis of the whole milk quantity ascertained by the sensor, and to mix the feeding portion so that the feeding portion contains this whole milk dosing quantity, • the electronic control is designed to calculate a switched-on duration for the milk delivery pump using the whole milk dosing quantity and a calibration factor, and to supply the whole milk dosing quantity to the mixing container by switching on the milk delivery pump for the calculated switched-on duration, and • the electronic control is designed to establish the calibration factor before each mixing process taking into account the data recorded by the sensor. • a water connection, • a storage container for milk replacer, • a whole milk tank, • a mixing container in which a feeding portion can be mixed, • an agitator arranged in the mixing container, • a whole milk supply apparatus with which whole milk from the whole milk tank can be supplied to the mixing container, wherein the whole milk supply apparatus comprises a milk delivery pump • a milk exchanger supply apparatus with which milk replacer from the storage container can be supplied to the mixing container, • a water supply apparatus with which water from the water connection can be supplied to the mixing container, • an electronic control which is connected to the agitator, the whole milk supply apparatus, the milk replacer supply apparatus and the water supply apparatus, • wherein the electronic control is designed to mix a feeding portion by actuating the whole milk supply apparatus, the milk replacer supply apparatus, the water supply apparatus as well as the agitator, characterized in that • the feeding system has a sensor for ascertaining a quantity of whole milk contained in the whole milk tank, wherein the electronic control is connected to the sensor, • the electronic control is designed to determine a whole milk dosing quantity on the basis of the whole milk quantity ascertained by the sensor, and to mix the feeding portion so that the feeding portion contains this whole milk dosing quantity, • the electronic control is designed to calculate a switched-on duration for the milk delivery pump using the whole milk dosing quantity and a calibration factor, and to supply the whole milk dosing quantity to the mixing container by switching on the milk delivery pump for the calculated switched-on duration, and • the electronic control is designed to establish the calibration factor before each mixing process taking into account the data recorded by the sensor.