Inbreeding of sheep can easily lead to the disadvantages of “two drops and one highâ€, that is, the production performance of sheep is degraded, the variety is degraded, growth and development are delayed, the production of flesh is reduced by about 50%, the reproduction rate is decreased, and the inbreeding causes freak and miscarriage. Chemical and stillbirths continue to emerge; sheep have poor disease resistance and high mortality. There are three main preventive measures: Change the kind of ram The rams in a flock are used for two consecutive years and then exchanged with the same species of rams in other flock to reduce the number of inbreeding mates. Rams reared individually During the breeding season, depending on the kinship, the rams with distant ancestry are selected to perform manual assisted breeding or artificial insemination. Using this method can not only avoid inbreeding, but also control the ewes lambing time and extend the useful life of rams. Create registration file In townships and villages with a large number of herds, sheep insemination stations should be established and a file system established, including male and female ewe cards, ewe breeding registration forms, lamb registration forms, and offspring determination record forms. With this archive, the kinship is clear, and it is possible to plan selection of breeding options to avoid inbreeding. Varicella Vaccine In Pfs,Varicella Vaccine,Varicella Vaccine To Kids,Take Varicella Vaccine Changchun BCHT Biotechnology Co. , https://www.ccbcht.net