i have used all the chicken pellets for years layers rearers and growers and have fed 100pc through the winter and bred some cracking y/bs but if racing no more than 10 pc as they do drink a lot of water and you dont need any other supplements go to John Crowders RECORD LOFTS you will get your eyes opened only feeds pellets and barley no supplements grit every secound day his y/bs are reared to perfection