How exciting!!!
Are you looking for a show pup or a pet one?
You could ask to see her contact ahead of the time

Most of the breeders have it ready

You could also look up their health clearances online as well on
www.offa.com Most of the states have laws at what age puppies can go to new homes which NORMALLY should not be before 8 weeks of age.
It seems you got it all covered about food/vaccination questions since BMD have MANY issues and should be on home made or HIGH quality kibble diet so you will know as soon as she/he tells you what they feed their dogs
Good luck and keep us posted