Rising milk prices and the prospect of bigger winter bonuses were key factors behind a superb trade for freshly calved heifers at Taaffe Auctions’ monthly dairy sale in Dungannon Mart last week.High-yielding pedigree Holstein heifers dominated the sale and prices peaked at 3,900 guineas (gns) for Mountainview Parfect Lavinia, from Moutainview Farms, Augher.