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Thus, for some producers, it is commonplace to breed well-grown ewe lambs when they are 7 to 9 months of age. Other producers wait until their ewes are 18 months old before breeding them to lamb as 2 year olds.Different breeds of sheep reach puberty (sexually maturity) at different ages.ams. A healthy, mature ram can probably mate 100 (or more) ewes during a breeding season, though a ratio of 1 mature ram to 35 to 50 ewes is more common to make sure lambing is not too spread out. Seven to 8 month old ram lambs that have achieved approximately 50 percent of their mature size can be used for breeding.
Ewes generally reach sexual maturity at six to eight months of age, and rams generally at four to six (ram lambs have occasionally been known to impregnate their mothers at two months). Ewes enter into estrus cycles about every 17 days, which last for approximately 30 hours. flock of sheep is generally mated by a single ram, which has either been chosen by a farmer or has established dominance through physical contest with other rams (in feral populations). Most sheep have a breeding season (tupping) in the autumn, though some are able to breed year-round.