For people who have no space for breeding larger animals but want to breed something cute, cuddly, and entertaining, why not start by learning about guinea pigs and breeding facts such as season, guinea pig gestation, number of babies, etc. Guinea pigs have been around for a long time, used for pets and breeding. As a pet, the guinea pig is sweet, has personality, and is fun to own. For breeding, this animal is relatively easy to care for and being such a popular pet, there is good potential for making profit.Once you get started with breeding guinea pigs, you will find this to be a very easy and rewarding product. For one thing, sows, or females can be bred starting at just five weeks of age although most experts suggest the male, which is called a boar, is not be introduced to the sow until three months.