First of, Welcome to YT. Wow, sounds like you have your hands full. Even at 7 weeks old, pups are too young to leave momma. Please make certain that you have something called Nutrical on hand. You can get it Petsmart, Petco or local pet supply store.
You should definitely make sure that your pup is eating and drinking water. I am no expert but hopefully someone with more knowlegde of pups will come on. Did your vet advise on giving any milk type of supplements? I would think that at 4/5 weeks they are still drinking moms milk?
Bumping this up, hoping that someone will come on that knows more about this. Also, you may want to try and start a thread in the Breeders forum as they are very knowledgable about what pups and moms should be doing at what age. Good luck to you and your baby. What is her name?
Just started this thread in the Breeder section for you...hopefully someone will be able to help you.
http://www.yorkietalk.com/forums/bre...ve-advice.html