Sheep can not be mated at any time, and time is not good, it will affect the sheep's own development, and future generations are not easy to survive.
Ewes are usually in the first 12 to 18 months, goats slightly earlier than sheep, fine-wool sheep, dairy goats over 1.5 years of age, the general initial ewe weight to achieve adult 60% to 70% is better. Sheep of 3 to 5 years old have the strongest fertility, and should be eliminated after 6 years of age. The best use of female sheep 6 years, female goat 8 years.
In the mating season, the ram had the strongest autumn mating ability and the worst summer season; the ewe’s autumn estrus was obvious and frequent, and the winter estrus was more concentrated. The breeding season for sheep in the northern region is generally between July and January, and the peak season for estrus is from August to October. Sheep winter lambs are bred from August to September. Spring lambs are suitable for breeding from November to December. Milk goats are good for breeding from August to October.
General conditions of good conditions to promote the production of winter lamb, is the 8 to 9 months to the sheep breeding, when the ewes good, estrus obvious, more ovulation, vulnerable to fetal, fetal development is good, newborn lamb, ewes milk, Yi Chenghuo, lambs in the Spring Deficiency period have been able to fully feed and can be slaughtered in the same year. Where the conditions are poor, it is advisable to produce spring lambs (after october to ewes).
The duration of estrus in sheep is 30 to 40 hours for sheep and 24 to 28 hours for goats. Therefore, sheep should be bred for about 12 to 24 hours after estrus. The estrus cycle of the ewes is 15 to 21 days, and the gestation period is 144 to 155 days, with an average of 150 days.
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