CHENNAI: Amid severe Aavin milk shortage, private dairies have increased the cover prices of milk by Rs2 per litre and of curd by Rs8 per litre, according to circulars sent to dealers here in Chennai. This is the sixth price hike by private dairies in the last 15 months and the second this year.Citing increase in milk procurement prices and raw material costs (used for production of toned, standardised,...