New Delhi: Leading dairy companies Amul and Mother Dairy have hiked milk prices by Rs 2-4 per litre, effective Thursday, due to higher input costs, including higher farmer procurement rates and increased fuel expenses. Gujarat Cooperative Milk Marketing Federation (GCMMF) and Mother Dairy, leading milk suppliers, last increased retail milk prices in May this year. Last month, Karnataka's popular dairy brand Nandini raised prices of its products.Full report P11