Chicken feed additive

The invention relates to a chicken feed additive which is prepared from greyhair cipadessa extract and dendrobium lindleyi stendel extract in the weight ratio of (2-1):(1-5). The invention also claimsto protect the application of the chicken feed additive in mixing with the other feeds for feeding. Experimental research proves that the greyhair cipadessa extract and the dendrobium lindleyi stendel extract are jointly used according to a specific weight ratio, the synergistic effect is obvious, the treating effect is significant and the cost is low. After the chicken feed additive is used, thepurpose of preventing and controlling chicken colibacilli infection diseases can be achieved without using the antibiotics. 本发明涉及种鸡饲料添加剂，由假茶辣提取物和木虾公提取物组成，假茶辣提取物和木虾公提取物的重量比为2-1:1-5。本发明还要求保护将上述鸡饲料添加剂与其他饲喂料混合投喂的应用。经试验研究证明，假茶辣提取物与木虾公提取物以特定的重量比例联合使用，协同作用明显，疗效显著，成本低廉；使用本发明后不需要再使用抗生素即可实现防控鸡大肠杆菌感染疾病的目的。