The person I got my Australian Shepherd from was a back yard breeder. She was crossing two blue merles. That is a no no. There is a resessive gene. I bought my dog from her. He was a blue merle mostly white. He had a dudley nose ( mostly all pink with some black on it. I took him to the Veterinary had him checked over. His right eye was smaller then his left & we found a claw growing in the pad of his hind foot. We got him home he was 10 weeks old & discovered he could not see out the the smaller right eye. I did some research & went back & told the back yard breeder about the resessive gene & the dog I purchased from her. I told her not to breed her two dogs again, did she listen, hell no. I don't know if she didn't care or was plain dumb?