1. Mistakes in breeding time Rams and ewes mixed together will inevitably mate freely and may lead to ewes' pregnancy and lambing throughout the year. This is not conducive to feeding and management, but also is not conducive to the development of the fetus. The resulting lamb is of poor constitution, low overwintering ability and low survival rate. In contrast, ewes produce better lambs in spring and winter, and winter lambs are better than spring lambs. Lambs produced in winter are generally pregnant from July to August. When the grass is lush, the ewes have good lyrics, and the conception rate is high. The lamb is born with large body, strong and robust, and the cortex is good. 2. Improper breeding partners Sheep are usually sexually mature at 7 to 8 months of age, but they are not suitable for breeding. Only healthy sheep aged 1.5 to 7 years are suitable for breeding. If the rams and ewes are raised and bred together, they will become pregnant if they are old, weak, ill, or disabled. This will seriously affect the growth and development of young ewe and seriously affect the elimination of old, weak, sick, and remnants. 3. Can not make full use of the free breeding of rams sheep, inevitably inefficient mating and redundant repeated mating, and a ram generally can only bear the task of breeding 15 to 20 ewes. At the same time, the ram's energy consumption will shorten the useful life and cause waste. Therefore, rams should be kept separately from ewes. During the breeding period, artificial assisted mating should be carried out. 4. The result is that the offspring's illegitimate sheep are free to mate. It is not always sure which lamb is the “father†of the lamb. If it is inconvenient for the selection of the species, it will inevitably be mated with the inbreds and cause hereditary diseases, thus losing the “hybrid advantageâ€. 5. Affect the normal feeding of ewes Rams and ewes mixed together, the ram will often chase the ewes, so that the sheep can not be tranquil, the ewes can not concentrate on feeding, thus affecting the growth and development of the ewes.
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