It is best to choose a species of male deer before buying it in the velvet season. At this time, the antler is big or small, good or bad, at a glance. If the antler has been sawed off, it must look like. The head is big, the eyes are gods, and the height is appropriate. It is not too high. The other is to look at the deer's ability to eat. The deer in the same deer farm eats the same feed. Deer, who loves to eat and has strong digestion and looks fat, is the ideal choice. In addition, the better the deer resistance to roughage, the easier it is to feed. Many experienced farmers deliberately use roughage to test their ability to eat when they are buying deer.