1. The boars usually start to adjust in June, and when the breeding and breeding are done, the ground of the breeding column should be flat, and it should not be too rough and slippery. The area of ​​the breeding pens should not be too small to prevent boars from causing trauma during mating. 2. When a reserve boar conducts training, the sows with stable estrus should be selected first, and the sows and the adjusted boar can not be too far apart. When the reserve boar first crawls, if the direction does not correspond to patient training, the assistant boar inserts the penis into the sow's vagina and completes the ejaculation. 3. The boar must be careful when it comes to injecting vaccines and performing necessary treatments at a young age. It does not cause too much stimulation to the boar, so as to avoid fear of fear to the breeder. 4. Before the boars participate in training and breeding, they will undergo some immunizations to prevent reproduction-disordered diseases. The JE vaccine should be injected one month before tune-up and ensure the quality of immunity. Breathing Circuit-Smoothbore,Anesthesia Ventilator Breathing Circuit,Medical Circuit Kit,Circuit To Build An Artificial Airway Hangzhou Trifanz Medical Device Co., Ltd , https://www.cfzmed.com