I got New Guinea pigs 4 days ago and they are both shy and scared. If I sit in one spot without moving they will come out and run around. I have a blanket over the cage and cannot see what they are doing. One guinea pig has this new habit of chewing or rattling the cage. I don’t think it’s because she want to come out or need more cage room. And she has toys that she doesn’t play with. There is enough hay and pellets. Is she trying to get out? I would let her out but she is way to scared, so I don’t really mess with her. I know it’s not a serious problem but she is starting to do it more frequently.