A female can have five litters in a year, although six are theoretically possible. Unlike the offspring of most rodents, guinea pig puppies have well-developed hair, teeth, claws, and partial sight. They are immediately mobile and begin to eat solid food, although they continue to suckle.
Females can become pregnant again within 6-48 hours after giving birth. Pregnancy lasts an average of 63-68 days, and the litter size varies from 1 to 6, with an average of three cubs. A sow can adopt cubs from another female.