Breeding period (43-130 days of age), this stage includes narrowly defined breeding period (43-98 days of age) and pre-birth phase (99-130 days of age). The former is the development of bones and muscles with the goal of establishing a suitable gastric volume. The latter is the developmental stage of the reproductive system with the goal of achieving physical maturity and sexual maturity. In order to raise young chickens, four attentions need to be paid: feed intake, uniformity, coccidiosis and enteritis, respiratory tract and Escherichia coli.
1. Feed intake
Both the growth performance and production performance of laying hens are inseparable from the support of feed nutrition, and the amount of feed nutrition intake is related to feed intake and feed nutrient concentration. The feed intake of a chicken is related to factors such as nutrient concentration, temperature in the house, and chicken weight. In the rearing stage (43-98 days old), too much bran is added. Affected by the high level of crude fiber, chickens need to take in more feed to meet their nutritional needs, resulting in excessive stomach volume, which further affects the entire feed intake; add Too little bran, high nutritional level, low feed intake of chickens, too small stomach volume, resulting in light eggs during the laying period, it is generally appropriate to add 8% bran during the growing stage (43-98 days of age). In the peak season, in order to ensure the feed intake of the chickens, it is necessary to reduce the temperature in the house and increase the frequency of refining to ensure the nutritional intake of the chickens.
2. Uniformity
The uniformity determines the speed and peak sharpness of the upper peak of the laying hens. If the uniformity is good, the peak speed is fast and the peak is sharp; if the uniformity is poor, the age of the chicken flocks will vary greatly, and it will not be suitable for large groups. Nutrition, changing layer feed too early, some flocks will have a series of problems such as gout and diarrhea due to non-laying eggs. Changing layer feed too late will cause thin-shelled eggs and paralysis in some flocks due to premature laying. Chicken and a series of questions. How to ensure good uniformity? Every time you make a vaccine, do a good job of separating cages, give better nutrition to those with lower body weight, promote body weight catch-up, and provide better light and ventilation.
3. Coccidiosis, enteritis
The harm of coccidia and enteritis is not only that it causes chickens to grow obstructed, gain slower weight, and even die. More seriously, it destroys the intestinal mucosa and affects the immune effect of intestinal mucosa. The mechanism of its effect is that the gastrointestinal tract is the body. The largest immune organ is also the first line of immune defense for the local mucosa. After damage, the immune function decreases, and the resistance to diseases becomes weaker. It becomes an extremely susceptible animal; in addition, protein is the raw material for the production of uniform and effective antibodies, and the energy is evenly produced. The power of effective antibodies, vitamins and trace elements are the catalysts for the production of uniform and effective antibodies. Damage to the intestinal mucosa affects the absorption of nutrients, and it is inevitable that the immune effect will be affected. So how to prevent coccidia and enteritis? Control and keep the chicken house dry, ventilated, and chicken farm sanitation, and remove manure regularly; add beneficial bacteria such as Bacillus subtilis and Bacillus licheniformis to the feed; keep the feed and drinking water clean, cages, and troughs , The sink is regularly disinfected.
4. E. coli and respiratory diseases
Avian colibacillosis is caused by pathogenic Escherichia coli, and its main disease types include death of embryos and young chicks, sepsis, air sacculitis, pericarditis, salpingitis, enteritis, peritonitis, and E. coli granuloma, etc. Control through the following ways: reduce stress as much as possible to prevent colibacillosis caused by various stresses; add beneficial bacteria such as Bacillus subtilis and Bacillus licheniformis to feed; add acidulant in drinking water to regulate the intestines The pH value of the tract changes its living environment to control the reproduction of E. coli; the feces are regularly removed; the chicken farms with frequent E. coli can be controlled by the immune E. coli vaccine; the respiratory disease of the laying hens is a common disease, and the occurrence of the disease is complicated and out of control , Difficult to control and other characteristics, causing economic losses to the chicken industry.
The disease can be prevented by the following ways: do a good job of disinfection of chickens in the house to eliminate pathogenic factors and dust in the air; maintain proper humidity in the house to prevent damage to the respiratory mucosa caused by dry air; determine mixed diseases based on symptoms Prescribe the right medicine.