I would first like to welcome you YT.
Before you buy this little 6 or 7 week old baby I would like for you to read 3 recent's threads on buying puppies under the age of 12 weeks old, or from unethical perhaps even BYB (back yard breeders).
You do not yet have this baby and you are worrying about the "what if's"
Why would even want to get this puppy.
Please read these 3 threads then decide if it's really worth getting this puppy.
Prayers needed for Xena Emergency Anemic 9 wo puppy Parvo. 
Please, read these threads BEFORE you buy this puppy.