
New moms do lose blood,my advice is to keep the pup warm,ideally put a thermometer in with her and make sure the temp stays aruond the 85 degrees,weigh the pup every day and make sure the weight is going up,you could also add a soft toy for the pup to nestle into,I have one that the heart beats and there is a heat pack in it so it is just like having a sibling or mom in with them.
If the pup does go cold please warm her gently and DO NOT feed till the pups body temp is high enough,cold puppies can not digest milk so please dont feed while the pup is cold.
If you need anything just ask there is tons of experiance and knowledge on the site,and best of luck.