Therefore, bloody BMW must be a hybrid with some local horses. The pony that may be born at the beginning has some characteristics of bloody BMW and has advantages over local horses in performance. But horses will continue to breed and develop, and bloody BMW can't be used for mating all the time. Therefore, in the process of continuous breeding, the final performance of these hybrid horses will gradually decline, and the excellent characteristics will gradually decline. At that time, the squad leader was used to castrating ancient war horses, which was more conducive to their combat capability.
However, after castration, bloody BMW can no longer mate with local horses with good quality, and there is no way to improve the quality of local horses in a short time. Moreover, the breeding science in the Song Dynasty also had a great influence on the cultivation of varieties, mainly because people in the Song Dynasty learned the backcross breeding technology at that time. Although this technology is beneficial, it can't be implemented well when people can't change their minds at that time.
Moreover, people who raised horses at that time were not ancient officials. In the Song Dynasty, most of the responsibility for raising horses was given to the masses. The masses do not have a good economic foundation, so it is difficult to give horses enough nutritious food. If horses are not fed enough, it will be difficult to give full play to their performance, and if they are not fed properly, their health and all aspects will decline. Therefore, if the ancient war horse is cultivated well, it can also cultivate excellent varieties, but people need to attach great importance to it.