PURPOSE: A natural feed is provided to enrich immunity and antibacterial property of domestic animals and to increase antibacterial immunity against all kinds of diseases.CONSTITUTION: A natural feed is manufactured by adding 2~3% of chito oligo saccharide, 4~6% of red ginseng extract, 88~93% of an excipient, and 1~2% of other additives. The other additives is a mixture including at least one selected from a mineral group, such as nanosilver, nanozinc, nanoiron, and MSM, or a vitamin group. The excipient includes corn, tapioca, wheat bran, rice bran, bean-curd dregs, corn gluten meal, gluten feed, and brewers grains, preferably, 15~25% of bean-curd degs, 25~35% of gluten feed, and 40~60% of rice bran.COPYRIGHT KIPO 2013본 발명은 키토올리고당과 홍삼추출물 및 부형제, 기타첨가물이 혼합되는 구성으로 이루어진 사료를 닭이나 소 및 돼지 등의 가축에게 급여함으로써 닭이나 소 및 돼지 등의 면역력을 증진시킴은 물론 풍미를 높일 수 있도록 하는 면역 및 항균성 증강용 천연사료에 관한 것이다.