I'm so sorry.
I don't think that a breeder needs to test all pups as long as the parents were tested, especially if the vet doesn't think it is healthy for them.
It is also not necessary for a dog to be faster for a BAT.
Instead of fasting them for 12 hours, they can just be ready for their next meal then draw blood, have them eat and draw again two hours later.
The test may not be accurate until 6 months anyway.
I probably used to think that testing pups was a good idea but I really don't think it's necessary now because it should be redone at 6 months anyway and if it could hurt them, it just isn't worth it.