Guinea Pigs eat Guinea Pig Food which is readily available at Petstores, as well as other stores; Walmart for example. They can also eat small amounts of fruits and veggies. You can also buy treats that are made for Guinea Pigs. I give my Guinea Pigs baby Carrots. They love them! I do not recommend large amounts of lettice!
Guinea pigs are easy to breed. They bear pups that are fully developed. The recommended breeding age for a female Guinea Pig is starting at 3-6 months. The males are ready to breed as early as 9-10 weeks of age. Males are called Boars. Females are called Sows. Only one male should be kept per cage. You can house multiple females together. Guinea Pigs will breed year round. Females are ready to breed every 14-18 days. The Gestation period for Guinea Pigs is 59-72 days. The average being 68 days. Females with small litters or that have previously given birth tend to have a shorter gestation. Pregnancy is usually apparent after about a month of gestation. Be careful when handling a pregnant Guinea Pig! Guinea Pigs do not make a nest, so it is difficult to tell when birth is near. Baby Guinea Pigs are called PUPS. A female will give birth to an average of 2-4 pups a litter. The PUPS are born fully haired with their eyes open. They eat solid foods readily, but will need to nurse from their mother for 3-6 weeks. If the male is housed with the female, you may want to seperate the babies at 3 weeks to keep the male from trying to breed with his young. Female Guinea Pigs should be breed by the time they are 6 months of age if you intend to breed them. After 6 months the bones of the females pelvic canal fuse, and may not open to allow the female to give birth. If this is the case, the female will die if not rushed to a vet for an emergency c-section.
BREEDING GUINEA PIGS IS A FUN EXPERIENCE, BUT PLEASE DO YOUR RESEARCH BEFORE DECIDING TO BREED ANY ANIMAL!!!