I have been having problems with a rescue rat and her litter. The babies are 4 days old and I notice that she isn't really feeding them. She prefers spending her time grooming herself, laying around, eating, but doesn't really go near her babies that often. I checked when they were first born and they had milk bands, but now when I check NONE of them have a milk band. It's stressing me out because they babies are so small. I have been feeding her eggs, chicken, nuts, seeds, fruits and veggies to help her with her milk production since she had 15 little ones. I'm worried since this is my first litter. Is there a way to make her more interested in her babies?