I have 2 gerbils they just habd their first litter of pups April 2nd. However I notice in the past 3 days she has nested them by herself for 1 day, shared a nest with the father for 2 days. Made a completely new nest this morning and left the babies in the old nest, and didnt move them over until later that morning. She also will at random move 1 baby out of the nest, never the same one always just a random one and puts them on the other side of the cage. Is this typical gerbil behavior or should I be preparing to bottle feed these babies?