As Demand Dips, Farms Dump Milk For Pernat Family, This Is A First In 100 Years By LIBBY CUDMORE • Special to www.AllOTSEGO.com FLY CREEK VALLEY – Since 1920, Mark Pernat’s family has sold milk from their Fly Creek Valley farm. “My dad always said, ‘If you make the milk, they’ll come buy it,’ said Pernat. But the truck didn’t come on April 5. “Our co-op called and told us we had to dump our milk and we would not be…