Less than six months
No. You can keep the sexes apart to keep them from breeding unwanted babies.
I would say that you shouldn't start breeding before 1 1/2 years old, any age before that is too young, and they need to mature, but after they do that, and have had at least 2 heats, and get used to it, then i would say its a good time to breed them.
Zookeepers need to know about reproduction because many animals are on the brink of extinction an need help breeding and this is why breeding programmes are used. To start breeding programme, you need to have the right knowledge, and this is why they need to know xxx
If a guinea pig is pregnant over a few weeks it will start to become bulging in its stomach area. You need to separate any male guinea pigs from her as they can kill the babies. Make sure the mother has lots of vitamin c and water. She tends to drink a lot more water through pregnancy. After a few weeks she may become slower and sleep more. If you think she is pregnant I suggest to read up about breeding guinea pigs. But always be careful breeding because there is a chance the mother may die.
Not before 2 years of age. Also need to get hips, eyes and elbows certified before breeding to insure you only pass on good (or better) qualities in the breed.
Give it at least a year before breeding it.
3 to 4 months old
You don't need a guinea pig.
They are born ready to eat and drink water on their own. They need to start being weaned at 2 weeks old and fully at 3 weeks old. Males become fully fertile at 3 weeks old and to prevent back breeding, they must be removed.
No. I usually slice an apple and put then in the cage.
2 cm for males (when they get very colorful) females, a little bigger
Because they are cute and if you are wanting a guinea pig you will need to take that big responsibility but before you buy one you need all of the stuff first. If you don't know what to call your guinea pig(s) just go to the website: Top 50 guinea pig names; and then click on the top one or any of them.