Free-range breeding has many advantages, but it also has some disadvantages in preventing parasitic diseases in free-range broilers.

After being out of temperature, the chicks were bred in the house for one or two months, and after the body weight reached 0.5-1.0 kg, they were fattened in orchards, fields, grasslands and mountainous areas. The advantages of this method are as follows: first, save feed and reduce feeding costs; second, make full use of chicken equipment and idle land to improve the utilization rate of equipment and land; third, increase the amount of exercise of broilers and eat weeds and insects to improve chicken flavor and chicken quality. However, there are some disadvantages, for many insects, such as grasshoppers, ants, houseflies and earthworms, are the intermediate hosts of parasites in broilers. For this reason, the prevention and control of parasitic diseases should be strengthened in broiler stocking.

Broiler

1. Common parasitic diseases in broilers:

1. Chicken Larry taeniasis: (1) infection characteristics: in the external environment, the eggs of Taenia solium developed into six-hook cercariae and cysticercus-like cercariae in houseflies, ants, beetles and other insects. When these insects were swallowed by broilers, they were digested and escaped from cercariae, developed into tapeworms and parasitized in chicken intestines after 2 to 3 weeks. (2) symptoms and hazards: long-term dysentery, loss of appetite, weight loss, pale crown, dishevelled feathers, drooping wings, hindered development and mass death after infection.

two。 Ascariasis of chickens: (1) infection characteristics: the main source of infection is adult chickens with worms, and the eggs excreted can survive in earthworms. After the chicken ingested earthworms and drinking water containing eggs, the larvae escaped, parasitized and infected in the chicken intestines. (2) symptoms and hazards: anemia, dysentery, bloody stool, stop development, rapid weight loss, severe death.

Second, prevention and control measures:

In the early, middle and late stages of broiler stocking, active prevention is the key to the prevention of parasitic diseases in broilers. The specific measures are as follows:

1. Do a good job of deworming: one month before stocking, the first deworming was carried out; after 15-20 days, the second deworming was carried out; and then every 1-2 months until the market.

two。 Fecal treatment: often clean the feces of the chicken house and replace the mat grass, and fixed point accumulation fermentation, in order to kill eggs.

3. Strengthen feeding management: keep the chicken house dry and ventilated, and disinfect it thoroughly regularly; observe the dynamics of broilers to achieve "early detection, early treatment"; prevent chickens from rain and animal damage; reasonably adjust the quality of concentrate to enhance the resistance of broilers.

Third, treatment: once the case of parasite infection in broilers is found, it should be treated in time.