Show using cod liver oil cod liver oil Is an important liens item in winter rations for poultry because 1 lt helps to egg production prevents lameness atilt helps then to lay trong strong shelled eggs ei gs it coal cont contrina nina A and D which crowth anith find and maintain vitality and resistance cot cod liver oil off Is essential SPIlt ial to liens that are closely gouged luring during winter vitamin D in tile oil Is a substitute for direct sall sunlight glit therefore its use Is most mast durins during winter |