At this time, it is necessary to seize the opportunity and train the chicken's foraging and foraging ability. After 4 ~ 6 weeks of training, the chicks formed conditioned reflex, and their predation ability and self-protection ability were greatly improved. When a chicken weighs about 500 grams, it has the basic conditions for stocking. You can disperse the chickens in the pre-set grazing places and start the natural ecological breeding of chickens, so that the chickens can display their skills in the open Shan Ye, freely catch insects, look for grass and peck at young grass.
The growth period of native chicken is mainly stocking, and most of the time is spent in the wild. Moreover, the growing period of free-range chickens is relatively long, generally taking 4-5 months, and various diseases may spread at any time. Therefore, it is very necessary to do a good job in chicken immunization. The prevention of chicken epidemic diseases is "important" and "expensive" early, Marek's vaccine should be vaccinated from the first day after hatching.
At the same time, under the guidance of veterinarians, do a good job in vaccination of Newcastle disease, bronchitis, avian influenza, cholera, bursa of fabricius, chicken pox and other vaccines. In addition, attention should be paid to the timely prevention, control and treatment of other diseases to ensure the healthy growth of free-range chickens.
Extended data
Prevention and treatment of chicken viral diseases
Newcastle disease is caused by Newcastle disease virus, mainly manifested as dyspnea, diarrhea, green feces, depression and neurological symptoms, head and face swelling, egg laying termination and so on. The mortality rate of sensitive chickens is as high as 50% ~ 70%.
Preventive measures: Chickens aged 7 ~ 10 were given the first immunization with new bivalent and tetravalent vaccine drinking water or nasal drops, and those aged 18 were given the second immunization, and Newcastle disease I was injected intramuscularly over 60 days old (drinking water with Qiwei Du Kang before and after each immunization can effectively improve vaccine immunity and body disease resistance, and mixing with Hengjiekang at ordinary times can reduce the incidence of Newcastle disease).
Chickenpox is caused by chickenpox virus, scabs can be seen all over the sick chicken, and chickenpox in throat can be seen as oral cavity, esophagus and trachea mucosal ulcers or yellow-white lesions.
Preventive measures: 14 ~ 2 1 year-old was vaccinated with fowlpox vaccine.
Infectious bursal disease is caused by infectious bursal disease virus. Symptoms are white or light green diseased chicken chops with sparse feces, listlessness, drooping head, closed eyelids, loose feathers, and finally extreme exhaustion and dehydration.
Preventive measures: drinking water with 14 ~ 2 1 day-old attenuated bursal disease vaccine, and adding 2% skimmed milk powder to the water; Drinking water containing Xiao Su Bubingning continuously after vaccination can reduce the stress response of the vaccine and control the incidence of bursal disease.
Baidu Encyclopedia-Chicken Breeding Technology