Dominance 2yo humping 3 week old

[lucien]

we just recently got a new baby, shes about 3-4 weeks old and our 2yo, which weve had for a year and a half is humping her, i know its for dominance but is there anyway i can help? i took her out once to stop her but i realized its better not to intervene but i still feel bad not helping, do i need to change out their domes or anything to let her be more neutral?

 

[bpatters]

Just checking to make sure your older one is female? Have you turned him/her over and looked to be sure? Because baby guinea pigs can get pregnant REALLY early, like 4-6 weeks, and you definitely don't want that.

Other than that, there's probably not much you can do. You can keep giving the baby a break when necessary, but she'll soon be large enough to fend for herself.