between particles increases. Solid-solid interactions between different particles may
come into effect when the distance between particles is sufficiently small, for instance,
when pressure during pelleting is applied. Under such conditions, binding agents cannot
be redistributed around the particles. When these bonds are present in large amounts in
the feed, time will affect the binding between particulates and the structural integrity of
the pellets may change with storage time (Pfost and Young, 1973).