Goats are considered small ruminants, a category that also includes sheep, South American camelids, and many cervids. Although goats and sheep are similar in many ways, they have substantially different nutritional requirements (see Nutrition: Sheep ). Goats are intermediate browsers , meaning that they will select browse, forbs, and other readily digestible plant materials and also eat grass, whereas sheep tend to be purely grazers. Goats are adaptable to grazing on grasses but are more sensitive than sheep to plant fiber intake. Goats can consume up to 6.5% of their body weight as dry matter, resulting in a faster rate of passage through their digestive system. This fast passage limits their ability to digest lower-quality forage. Goats are more tolerant of copper intake than are sheep and may be predisposed to copper deficiency if fed mineral products formulated for sheep.