To this end, a three-year practical trial will be carried out with the LFS Edelhof dairy herd. Selected animals from the organic dairy herd are evenly assigned to two experimental groups, which only differ in the amount of concentrated feed supplementation. The cows receive hay, grass silage and, during the grazing season, pasture feed as basic feed. The concentrate differentiation between the control and experimental groups takes place in the feeding and lactation phases. Depending on the milk production level of the cows, the aim is to use 1300-1600 kg of fresh mass in the control group and 700-850 kg of fresh mass in the experimental group. In the experimental group, especially from mid-lactation onwards, concentrate supplementation was implemented to a significantly limited extent compared to the usual concentrated feed supplement at the LFS Edelhof.