Dr Richard Mellanby was representing the VitDAL at the 9th International Sheep Veterinary Congress (ISVC) which was held this week at Harrogate. He was presenting data from the Soay sheep project which has shown that higher vitamin D status is linked to greater fecundity in this wild, unmanaged population. The data has stimulated a collaborative research programme with commercial sheep farmers as the VitDAL explores whether the vitamin D supplementation can improve productivity in commercial sheep flocks.