Hi and Welcome from Canada!
I already have red flags that any breeder who is wanting to push the babies out at 6 weeks does not have the best interest of the puppy in mind. From Ivan's second link..
When a puppy is part of a litter, he learns all sorts of valuable lessons. This is the time to learn important life skills from his mother, such as eating and grooming. His littermates will help teach him socialization. If he’s taken from his mother too early, he will be robbed of these valuable lessons and may not thrive or socialize well with others.
Those 2 weeks are very important in the socialization of the pups. If the breeder does not recognize that, I would run. A breeder should be bending over backwards to make sure that the new families are getting a well socialized puppy. They learn bite inhibition from mom and littermates that cannot be taught by their new family. Please reconsider purchasing from this breeder. If she is on 'the other side of the bridge', then perhaps you should look for someone on this side. Support a breeder who is doing things the right way and have the best interest of healthy pups her top priority.
Ch. Beau, our 14 yr old red guy
Georgia Peach pie, 8 yrs old
Jemma, red pie girl 1 year
~Penny~