Nicole has stated that she was breeding for service dogs, now you say she is breeding for therapy dogs. There is a big difference, so which one is it?
Before getting a therapy dog you need your cgc, which Nicole has not said her dog had. How can you breed for anything if your dog is untitled. I have to agree with Jackfrost on this, all I've seen so far are 30 or 40 yr old links and pictures.
As for service dogs or therapy dogs there doesn't seem to be any that can pass cgc to become one.
Also there are absolutely no white GSD schH dogs. This I have checked out with our German friends who run a school for training schH. They have all the information from the other schools as they run together.
Maybe Nicole means that people train them by themselves for the fun of it (which can be very dangerous) but there are no graduates anywhere, nor any police dogs.
From what I have been told, the whites are lacking in temperament and nerves, therefore aren't suitable for much of any work.