I recently acquired two female guinea pigs - a mother and her 8 week old baby. I am told she was the only one in the litter. The cavvies have settled in, but the mother has started chasing the younger one out of the sleeping compartment of the hutch. The half grown sow is now huddled outside the door or the sleeping area. Is this usual behaviour? What can I do about it? Is there a way I can encourage them to cuddle up again?