Effective measures to reduce the death of chicks by raising white-feathered broilers

At the age of 4 weeks, the thermoregulation function of chicks is not perfect, the requirement for nutrition is high, the resistance to diseases is weak, and they often die because of various diseases. Preventive measures should be taken to reduce death and improve the survival rate of brooding.

(1) Prevention of pullorum in chicks: the analysis of the causes of death of chicks showed that in the case of breeder chickens without quarantine of pullorum, the mortality rate of chickens infected with pullorum accounted for more than 50% of the total deaths of chicks, while among the chicks who died of pullorum, 87.9% died in the first week of brooding. Because during the incubation period, if the disinfection of each link is not strict, the disease can be infected in the egg breeding or chicken embryo stage. In order to prevent pullorum in chickens, in addition to regular quarantine of white dysentery, strict elimination of positive chickens, fumigation and disinfection of breeding eggs and chicks, antibiotics must be added to the feed before 3 weeks of age, and the following drugs can be used for reference. ① chlorophenylguanidine 0.0033% mixing material, or dysentery 0.02% mixing material prevention. After the onset of ②, dysentery was increased to 0. 04% and fed continuously for 7 days, which could significantly reduce the mortality of sick chicks. ③ oxytetracycline, chlortetracycline or chlortetracycline were mixed into the feed at 0.02% for 7 days. ④ sulfadiazine or sulfamethazine press 0. Mix 0.5% into the material and use 3murl for 5 days.

(2) strict disinfection to prevent umbilical infection: if the incubator, nursery and all kinds of appliances are not sterilized strictly, there are all kinds of bacteria, such as Escherichia coli, Pseudomonas, Salmonella, etc., may invade the yolk sac due to poor closure of the umbilical hole, causing infection and inflammation, that is, omphalitis. It is characterized by abdominal enlargement, umbilical swelling and dampness, an unpleasant smell, and death due to toxemia. Autopsy showed that the unabsorbed yolk and yolk sac were enlarged, the yolk was watery or brown watery, and the yolk sac was easy to rupture. The measures to prevent the occurrence of this disease are to strictly disinfect the brooding room and utensils, disinfect the staff to enter the hatching room, the brooding room and before operation, and take strict isolation measures to ensure that the brooding temperature is normal and after the yolk is absorbed normally, it can greatly reduce the chance of infection, prevent human cross-infection, and greatly reduce the morbidity and mortality.

(3) strengthen the epidemic prevention system: chicks are most likely to be infected with acute infectious diseases such as Marek's disease and Newcastle disease. Once they spread, they are very difficult to control and may be wiped out. Therefore, in line with the principle of prevention, we should formulate an epidemic prevention system and immunization procedures and carry them out meticulously.

(4) drinking water early to prevent dehydration: 9.93% of chicks die from dehydration, mostly due to vaccination, transportation and some preparatory work, resulting in excessive time from hatching to drinking and excessive loss of water. In addition, the chicks can't drink water when they are fed, or if they don't drink in time, the weak will collapse. Chicks who died of dehydration in the first week accounted for 64.9% of the total number of dehydration deaths. So start drinking as soon as possible. In order to ensure that the chicks drink water, 1 Mel 3-day-old chicks must have 23 Mel 24 hours of light time, the light intensity reaches 15 lux, in order to make the chicks familiar with the location of the drinking fountain as soon as possible, it is also necessary to drink before eating. It is more important to drink water uninterruptedly at ordinary times, especially within 2 weeks of age.

(5) keep the temperature of the nursery stable and the humidity suitable: in order to improve the survival rate of brooding, we must provide suitable environmental conditions for chicks. Provide a suitable temperature, and keep dry and stable, the temperature does not change much, using a coal stove for temperature supply, night room temperature is very important. Avoid the phenomenon of heat death, freezing death and crushing chicks.

(6) strictly prevent poisoning death: when using various drugs to treat and prevent diseases, it is necessary to correctly calculate the drug dose, so as to avoid excessive dose and cause drug poisoning. In doing a large group of treatment inches, the medicine and feed must be stirred evenly, first with a small amount of powder, and then gradually expanded to the prescribed content according to the proportion of 1:10. When administering drugs in drinking water, the tablets must be fully ground and ground, and then dissolved in the water, so as not to precipitate at the bottom of the drinking fountain, resulting in excessive intake.