Enyijia herbal selenium-enriched SOD antibiotic-free feed additive: 1. It mainly contains amino acid selenium, yeast selenium, selenoprotein and so on. And the feed containing the additive does not contain any antibiotics, so that the absorption capacity and immunity of livestock and poultry can be improved, and the hatching rate of breeding eggs can be improved; 2. Adding a variety of valuable Chinese herbal medicines has the effects of invigorating spleen and stomach, benefiting lung and qi, nourishing qi and blood, significantly improving the egg laying rate, effectively reducing the occurrence of respiratory tract, intestinal tract, coccidia and other diseases, improving the body's immunity, enhancing anti-stress ability, eliminating drug resistance, and making your breeding easier; 3. Strengthen the addition of functional vitamins, the body is healthier, the eggshell quality is good, and the egg color is more shiny; 4. Organic trace elements can replace inorganic trace elements, which can effectively avoid the occurrence of sand-shelled eggs and deformed eggs in the late laying period; 5. Strengthen the addition of immune nutrients, greatly reduce the incidence of epidemic diseases, effectively improve the body's autoimmune reaction level, and prevent the propagation of adenovirus (EDS-76); 6. Add nutrients to protect liver and kidney, so that the laying performance is better and the peak duration is longer.