The Christmas show and sale of dairy cattle at Ballymena Livestock Mart saw a roaring trade, with 56 animals selling to a top price of £2,420 for the champion heifer bred by Sam Wallace, Broughshane, Co Antrim.Several lots sold above the £2,000 mark for freshly calved heifers in milk, with standout prices of £2,080, £2,200 and £2,270 being paid for top-quality prizewinning animals.