* Male guinea pigs can impregnate a female even if she is already pregnant. This can lead to a dangerous condition called "dystocia" where the baby guinea pigs can't pass through the birth canal, putting both the mother and babies at risk.
* Male guinea pigs can be aggressive towards pregnant females. They may bite, kick, or harass her, causing stress and even injury.
* Guinea pigs are highly social animals and need to be housed with compatible companions. A pregnant female guinea pig needs a calm and quiet environment to focus on her pregnancy and prepare for birth.
The safest option is to keep a pregnant guinea pig separated from any male guinea pigs. She should be housed with a female companion or alone, in a clean and comfortable environment.
If you're unsure about anything related to your guinea pig's pregnancy, it's best to consult with a veterinarian. They can provide the best advice for your individual situation.