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In domestic dogs, sexual maturity (puberty) occurs between the ages of 6 to 12 months for both males and females, although this can be delayed until up to two years of age for some large breeds. Pregnancy is possible as soon as the first estrus cycle, but breeding is not recommended prior to the second cycle.
A doe should be at least 80 lbs before breeding. When it comes to breeding, itâs not so much age as it is size. Most of your standard sized dairy goats will need to make the weight of about 80 lbs before they are bred. A healthy, well-fed doe should make this weight by about 8 months. Some people like to wait until they are about 1 1/2 years old before breeding but it isnât necessary. I have seen no reduction in growth between breeding 8 month old does and 1 1/2 year old goats.