The only advice I could give you would be to NOT get the pup at such a young age. Even if the mom is no longer able to nurse, it's the breeder's responsibility to continue raising the pups until it reaches a suitable age to be released. It's not the ideal situation, but it's definitely does NOT justify separating them from the litter mates and placing them with new owners at such a young age. Placing them at under 8 weeks is not even LEGAL in many states.
I'm sorry, but I truly believe that if you get this dog, not only are you just setting yourself up for a rough time and heartache, but you are also supporting a breeder with very unethical breeding practices, which would make you both pretty irresponsible.
