What are the hygiene and epidemic prevention measures for meat-type breeding chickens?

The sanitation inside and outside the house should be cleaned frequently, manure removed promptly, and disinfection carried out regularly. Preventive medication should be given routinely, but drugs must not be used indiscriminately; the immunization program for meat-type breeding chickens should be strengthened and improved, vaccines used scientifically, and, based on the actual conditions of the farm and the natural conditions of the region, scientific immunization should be carried out under immune monitoring to reduce various stresses and achieve "all in, all out." The above measures are very important for improving the uniformity of meat-type breeding chickens. If the flock becomes diseased, even without deaths, the chickens will vary in size.