EC Drummond’s Shirley Copeland has retired after a distinguished career in broiler production marked by a steadfast commitment to excellence. Michael Barker hears all about it from her and managing director Sam Drummond Not many people would be beating themselves up over performance figures one day before their retirement. Shirley Copeland, it’s fair to say, is cut from different cloth. Far from coasting towards the conclusion of a career spanning over three decades in poultry, the 66-year-old production manager at broiler producer EC Drummond is cursing the fact that she only had one shot at joining the rarefied company of…