That's unfortunate, indeed.
Note that no dog is truly hypoallergenic. The allergens produced by dogs are expressed in their dander and their saliva. All dogs produce both of these things. The likelihood of your daughter being allergic to a dog can also vary by individual dog--she may be allergic to one dog, but not another, even if they're the same breed. It depends on how much allergen that one specific dog is producing.
That said, Vizslas tend to be better tolerated by individuals with allergies, probably due to their short hair. That's a risky generalization to make, of course.
I would second the recommendation that you go and visit a breeder, preferably yours. Best to get this all figured out before a puppy comes home. Ask if you can spend the day around the dogs, and let your daughter play with them. Do make sure she gets licked by them as well--I have a friend who is not allergic to dog dander, but does get hives when she is licked by them. See how she reacts as the day goes on.
Also discuss this with your allergist. If her reactions to dogs are quite mild, then allergy shots may be enough to keep the symptoms at bay. Good luck, and keep us updated!