From 1 April 2025, suppliers to NI’s largest dairy co-op, Dale Farm, will see a number of changes made to their pricing arrangements, including to the value put on butterfat and protein.At present, suppliers are paid from a butterfat base of 3.95% and a protein base of 3.24%. Every 0.01% change in butterfat is valued at 0.031p/l, with each 0.01% change in protein valued at 0.048p/l.