Hi I would just suggest making sure they have all the food and water they need and a quiet place, If they become stressed they may kill the babies, lack of food and water or too noisy and environment can cause stress. Or you can just feed the babies off, then the adults. It depends what you want to do if you want the hassle and smell or raising them. You do not need rat chow, dog food would do or other left overs rats are not too picky.