Just my opinion - no matter how people try to fit a square peg into a round hole - a mix is a mix and nothing more - as far as genetics go. I have had mix breed Aust. Shepard and collie when my kids were growing up and a mix golden - we called him shredder (no that is a long story) and both were very sweet and lovable. But if I wanted a mix breed - I would go down to the pound and save a sole. Why bring more mix pups into this word when there are so many that die in the pound or never find a home.
I was listening on the radio yesterday morning and there is this guy that makes cd's for dogs (Scratch, Scratch - is one title) anyways - he said they had this dog psychologist to help them find out which songs dogs like best and they used dogs in this one pound as testers. What they found out is that dogs did not like to phrase "I'll be right back," since they actually knew they were never going to have a home. How sad!!!
They actually know.