My boyfriend and I just got two rats, Sable and Penelope (Penny). Penny sniffs us and doesn't seem to worried but she won't come onto our hands yet and moves away if an attempt to pick her up is made. Sable has taken food from our hands but doesn't come out of a cubby corner very far when we are right near the cage. Any extra things besides treats and gentle petting that we can do to eventually get the two anxious to come out of the car and play? Thanks!