Hi all! I've had my 3 ratties for about a month now. 2 of them are very social and love to be held and sit on my shoulder. The other one though is still very shy. She's comfortable enough to even walk on my hand but any move I make to pet her or pick her up she runs away terrified. Is this normal and should I just respect that she doesn't like this or is there a way to make her more comfortable being held? Thank you!