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When breeding pigs, select sows that are at least 9 to 10 months old as this is the ideal age for breeding. For the boars, you can either buy them when they're at least 8 months old if you have a small number of sows then breed them with a larger number as they grow older.
Guinea pigs may become sexually active at an age of 1 month. Under improved conditions, the animals are used for breeding at an age of 3 months when they have a weight of at least 600g. One male is sufficient for a group of 12 females. Pregnancy lasts about 68 days and after that 1 to 4 young ones are born.uinea pigs may become sexually active at an age of 1 month. Under improved conditions, the animals are used for breeding at an age of 3 months when they have a weight of at least 600g. One male is sufficient for a group of 12 females. Pregnancy lasts about 68 days and after that 1 to 4 young ones are born.