I have been to three Schnauzers Walks
where there are hundreds of Schnauzers of all sizes (though mostly mini), and to many parks and other places, and I have only ever seen one single toy. It was really cute, and just a puppy. It weighed 2.5 lb and would weigh only 5 lb at adult size, yet play-fought with Muka like it was a big dog! I was worried Muka might hurt it, and so was very careful.
A vet I know said she hated treating toys because they are so small, but then that's true for all small animals, including hampsters! LOL
I have seen a number of parti Schauzers, and was tempted to adopt a rescue that I showed in the Rescue forum for a long time. But I don't know what they bred to get the colors, and I'm afraid of possible allergies. Though please don't repeat this... I don't want my concern to turn into false information... that parti Schnauzer is not hypoallergenic like the minis... it just concerned me.
If you google Schnauzers for sale you find lots of toys (and teacups) and parties, and it concerns me that many could come from puppy mills. Not because of the types, but because they are being sold on-line. I don't know any breeders that sell these types of Schnauzers, but that could easily be explained by the fact that all the breeders I know show their dogs and AKC will not let these types be shown.
One breeder suggested that whites were breed by continually breeding the lightest dogs, and that health issues were created in the process. But that doesn't mean that a responsible breeder couldn't have a very healthy line of whites.
Every year at the Schnauzer Walk I do see many happy, healthy looking whites and parties! Just never a toy.
This is a cup is half full or half empty kinda thing, but yes, you could say these types are disqualified by the AKC. But you could also say that standards for these types just haven't been accepted yet!