I don't know the purpose (if any) behind some of the mixes, but I know the labradoodle and other poodle mixes aren't just done to prevent shedding, but because so many people are allergic to dogs. Poodles aren't always a desirable breed so they mixed the lovable lab with the poodle to get the benefits of the lab's personality with the coat of the poodle. Not all of the mixes have this desirable coat so you have to go to a reputable breeder to make sure. I prefer mutts to pure bred and wish that ALL the breeding could be kept to a minimum until all dogs find a home, but I can see why a person with allergy issues would want a poodle mix. Its better to seek out a dog that can be allergy free, shed free and a part of the family rather than condemning one to the basement or back yard alone.

I am the proud owner of a hilarious bassador (bassett/lab). He was probably an accident and not on purpose, but he's wonderful.