I have finally got in touch with the lady that takes guinea pigs and explained the problems I've been having. She agreed that if after the three weeks I've had them that the problems aren't getting any better - which they're not, it's getting worse, with lots of nipping and squeaking and rumblestrutting - then they really need splitting up. She's going to get back in touch with me asap. I has a sad about this, but they have to go. I will cry.