I bought 2 guinea pigs for my children back in July 07. They were meant to be 2 girls but they both turned out to be boys. They are in the same hutch and generally get on well except i have noticed that they nibble each others ears. They both have lots of little nibble marks ( like dents) in there ears. They dont like being seperated, like if one is picked up and the other one is not. They squeak really loud until they are back together. Has anyone any ideas why they do this? We have also brought a female and she is in a cage seperatly.