Due to the long, flexible thin lips of the sheep, the lower incisors are slightly bowed outwards and sharp, and the forehead is flat and firm, making it easy to eat and cut pasture. There are many kinds of forage grasses eaten by sheep. According to statistics, sheep can use 552 species, accounting for 80% of the 665 plants, and cattle can't use plants 28% more than sheep. The utilization rate of crop straw with high crude fiber content can reach 70%. Sheep prefer to eat grasses and trees with less crude fiber and more protein. Most of the sheep's feeding time is concentrated in the daytime, and the start of feeding is closely related to the sunrise, but the sheep does not continuously feed. Every day, they only eat a large amount of food within a certain period of time, but at other times they cuddle and rest. It was determined that the sheep had the highest intake in the morning and at dusk. In addition, the feed intake of sheep also changes with the seasons. In spring, the grass just germinated and the branches turned green. At this time, the sheep feed was not picky. When summer and autumn grasses flourished, selective feeding was started. For gramineous pastures, they like to eat at the time of flowering and heading; for leguminous pasture, they prefer to eat when the grain is rich; for branches and leaves, they like to freshen and eat green when they are fresh. At the end of the fall, the plants turn from green to yellow. At this time, the sheep picks up the green part. In winter, sheep mainly eat defoliation, weeds and straw.