Provided no deliberate overgrazing is imposed on the system, this decision making process will result in optimal management of the forage resource. Unfortunately, unbalances may occur due to the consideration of other factors not linked to pasture growth. For instance, at times of high forage demand (too many animals or low pasture growth during the dry season), a paddock may be grazed before reaching its ideal upper level. Or it may be grazed beyond its ideal lower level; overgrazing occurs. Unfortunately, the data available do not permit a detailed analysis of these limitations.