Chaff is hay cut into small pieces for feeding to livestock. It is a good fodder, and at its best is cleanly and evenly cut, free of dust, of good colour and with a fresh aroma. Other materials are sometimes described as chaff, such as:

• The husks of grain separated by threshing or winnowing, often known as cocky chaff
• Portions of the flowers of grasses
• Chopped green or dry fodders.

Chaff can be purchased from commercial chaff cutting mills. Some people are starting up their own private cutting operation and this Agriculture Note provides advice to such people.