It's my understanding that its not too uncommon for mama to be dry, new mamas or even seasoned mamas. If she is dry then I just suggest grabbing the babies and bottle feeding them. I've had to do this for a family who didn't want to get their outdoor female cat fixed......... and she was a dry mom so I would always take and bottle raise her litters for them because I could do it and had the time and I wasn't going to have a litter of babies die on my watch.