Antibiotic additives can not only prevent diseases and keep fit, but also promote growth and development. For 1 month-old chicks, the weight gain can be increased by 10% ~ 15%, and the feed reward can be improved. The use effect is more obvious in the case of poor epidemic prevention and hygiene conditions and imperfect feed. But not suitable for excessive long-term feeding. Feeding is generally stopped during the laying period and 7 ~ 10 days before the broiler goes on the market. Commonly used antibiotic additives are chlortetracycline (100 ~ 500g/ ton), oxytetracycline calcium (100 ~ 200g/ ton), neomycin sulfate (35 ~ 55g/ ton) and monensin (5.5 ~ 10).

(2) Insect repellent health care agent

Mainly refers to the anticoccidial drugs added to the feed of broilers and other chicks. At present, there are many drugs used to prevent and treat coccidiosis, such as chlorpheniramine, Keqiu powder, Jibao 20, sodium humate and so on. The dosage of these drugs should be strictly controlled according to the instructions for use, otherwise drug poisoning will easily occur.

(3) mildew inhibitor

Additives used to prevent feed from going moldy and deteriorating in high temperature and high humidity environment. Mainly calcium propionate, sodium propionate and so on. 0. 1% ~ 0.2% of the feed.

(4) Antioxidants

Its function is to alleviate or reduce the oxidative decomposition process of fat, vitamins and pigments in compound feed, so as to increase its stability and use effect. Antioxidants used in chicken feed mainly include kaempferol and ethoxyquinoline. , accounting for 0.0/kloc-0.5% ~ 0.025% of feed.

(5) flavoring agent

Fennel oil is commonly used in production, and 5% fennel oil 14 mg should be added to each kilogram of diet. Farmers can add a certain amount of garlic and Chili powder to feed to promote the appetite of chickens.

(6) Colorant

In order to make the beak, shin and skin of broilers yellow, a certain amount of colorants, such as lutein and carotene, can be added to the diet.