The objective of this series of studies is to describe the contribution of causative
factors that contribute to the physical quality of animal feed pellets. In this first article,
criteria for pellet quality are evaluated. An overview is given of the binding mechanisms
involved in pelleted feeds. In addition, different devices are discussed that are used in
the compound feed industry to evaluate the hardness and durability of the pellets. Some
general recommendations are given on what should be taken into account when using
the different methods with which pellet quality can be evaluated.