She sounds like she cares very much about her puppies
A "greeder" would not have "wasted" money on a vet visit, they're all about profit
I wouldn't let one hypo attack keep me from selecting this puppy, if she's the one you fall in love with. However, I'd definitely ask what kind of testing the dam and sire had before breeding, and if the puppies will be having any lab work at their pre-adoptive vet visit. Also, I'd be concerned if there were additional attacks, as it can indicate a deeper medical issue (but not always!!)You can always keep posting here with any questions/info----there are so many great breeders here that can guide you on questions to ask and whatnot.