conducted an experiment with very high (500 g during 10–24 days and 600 g during 24–38 days), high (300 g during 10–24 days and 400 g during 24–38 days) and moderate (125 g during 10–24 days and 300 g during 24–38 days) replacement of ground wheat per kg of diet with whole wheat, barley and oats, and found that pH of gizzard contents was not conclusively affected by grain type or form of the grain.