Yea
Improved:
This is a possibility, but is not always the case. Many guinea pigs get along just fine; no matter what litter they are from. On the other hand, two guinea pigs may fight whether they are from different litters or not. You should always be careful and monitor interactions between two guinea pigs who are just meeting. Once you are sure they will not fight, you can let them be together in a large enough cage without constant supervision.
If the younger one is new to the older one, yes, if not it could go either way.
Yes, just make sure you wash it with a vinegar and water solution, then with normal soap and water to remove the 1st guinea pig's smell.
No its not, i guinea pigs cage is way bigger. & you should not have the same size of guinea pig cage as your hampster.
Yes,you can keep her female cagemate with her unless the cage mate tries to harm the baby.If she does that you will have to keep them separated at least unti the baby is older.
no
If its a boy its three weeks but girls can in the same cage.
Yes
yes u can, at the moment i have two females in the same cage together they are about 2 weeks old, and they're getting on pretty well.
because guinea pigs are aggressive
if they like it let them but don't be surprised when they have a baby mixed who knows it might be a cute baby.
No, I wouldn't put them in the same cage, I don't think they would get on too well.
It's best to keep them in the same cage for about a week. And you have to put them in the same cage together for about and hour each day after that for a while. I have 3 male guinea pigs at home and usually the guinea pig who came into the family or home first will try to show the other guinea pigs who is in charge (Or dominant). It usually takes about a week to two weeks for the guinea pigs to work it out and become great buddies.
Yes! Most guinea pigs love to be together and will be happier and livelier. Just make sure that the cage is big enough, and that the guinea pigs are the same sex.
No, they tend to fight.