Grain is increasingly being processed worldwide to
produce feed for animal husbandry. The changes taking
place in eating habits contribute to this situation. In order
to lower the energy consumption involved, less use is
being made of impact stress with the help of hammer
mills to reduce grain particle sizes. This is because far
less energy is required when pressure and shear stresses
are applied in roller mills (Fürll et al., 1996; Hoffmann et
al., 2011). However, what is interesting here is whether
the different kinds of stress lead to changes in the
physical properties of the ground product that than need
to be taken into account when dimensioning plant and
equipment. As barley represents a significant
component in dry compound feed formulations, studies
were first conducted with this cereal.