That's a bad idea because the doe gets very protective and may attack the guinea pigs.
NO.
No, While guinea pigs are considered rodents rabbits are considered Lagomorphs.
A guinea pig can only get pregnant if a male guinea pig has humped it. A guinea pig may have fallen pregnant while it was in the pet shop or where ever you got it. Now if you think she is pregnant it is important to research breeding guinea pigs.
The size of rabbits and guinea pigs really depends on it's species. There are types of rabbits and guinea pigs that only grow a little, while others grow a lot. The things they eat also effects the size of it. Normal guinea pigs;males can be about 19-25 cm. Females are about 18-23 cm. Rabbits can have a big difference.
None at all.
yes you can but you can not pick the rabbit up while it is pregnant because you will hurt its stomach. If the rabbit has already had its baby and the babies are in a nest then you can not clean its hutch out until the baby rabbits are old enough to play out side .
Yes, generally aggression is usually a good sign that your rabbit is pregnant.
no they do not. hares are slightly bigger and flatten their ears while running to maintain speed while rabbits keep their ears up
yes they can but what would happen with the baby what if its squash
Nothing. But she wont mate while she is pregnant. Guinea pigs dont mate unless they are on heat.
While they can it's not a good idea. Their dietary needs are similar but different. Additionally, a rabbit has powerful hind legs and can injury or kill a guinea pig with a kick. Some rabbits and guinea pigs have been known to live together peacefully for years, but often that is not the case. I have a rabbit and a guinea pig and a rabbit living in a puppy pen together. I give them separate cages. They love each other and get along great.
If there is a male nearby yes. OVERALL YES