Your dog is a female right? Because if it is, and its having problems nursing, there could be multiple reasons for this. If, for your dog, it is the first time having puppies, it oughter know instinctively what to do, and you should consult a breeder or a vet. They may need to do a number of bonding like things to get the mother to accept them as she may of rejected them at birth.
hand raise them
yes
no
Bring her and the puppies to a vet immediately.
a vet
no it just killed four of my puppies highly recommended not to do it
NO other dogs should be around the pregnet dog :o)
Go to the vet right away.
You can start taking puppies from their mom at 7 to 12 weeks.
My dog is having the same problem, luckily we have another dog who tends to take care of the first dog's puppies, but still, why won't she pick up her own puppies?? The bigger dog takes care of the smaller dog's puppies.... the smaller one has never picked up her puppies...
they will want to be alone
yes