Labradoodles were specifically bred for the size, temperament, stability and trainability factors of the Labrador, a breed that has long been used as a Guide Dog, and the non-shedding coat of the poodle.

Having known Wheatons, I cannot imagine one as a guide dog. They are great dogs, but complete terriers, really active and too short for most people to use. Same is true of many other non-shedding dogs. And while the dander is what causes people to react, not the shed fur, the dander stays close to the skin with non-shedding dogs, and many people with dog allergies can have a non-shedding breed with much less reaction.