Butter produced by Lakeland Dairies is going head to head with Kerrygold butter on US shop shelves. At the high-end Whole Foods grocery store in Chicago, the Lakeland Dairies product is retailing at $4.99 (€4.59) per 8oz pack while the Kerrygold price is 30c lower at $4.69 (€4.31) for the same size pack.