Purified diets prepared from finely ground constituents such as starch, casein, gelatine, cellulose, etc., are not readily acceptable by poultry. This is probably due to their powdery nature, for Coates, Kon & Shepheard (1950) found that chicks grew faster when fed a granulated purified diet than when this was fed unprocessed. Granulation was accomplished by mixing the diet with about a third of its weight of water, pressing the resulting paste through a no. 8 sieve and drying the granules at 40 °C.