 Another consequence of different grazing styles is variation between species in the number of units that can lead to overgrazing – for example, horses may overgraze the short parts of a pasture even when taller grass is still available.Livestock grazing comparison units are used by many governments to measure and control the intensity of farming.For example, until 2004 the UK Government had an extensification scheme which paid additional subsidy to farmers who kept their livestock at less than an average of 1.4 LUs per hectare.