Many horses swallow their grain in great haste; when much is eaten, this is dangerous. The stomach is filled, overloaded, before it has time to make preparation for acting upon its contents. The food ferments, and the horse takes colic, which is often fatal. By adding chaff to his grain, the horse must take more time to eat V

Satiety takes place before the stomach is overloaded, and time is given for the commencement of digestion, before fermentation can occur. In this way chaff is very useful, especially where the horses receive large meals after long fasts.