I agree that the Woodhaven site is a credible source for MOST of its information. However, the part about them being mixed with Weims is one scientist's hypothesis, and the basis for her reasearch.
"I would suspect that silver Labs were a combination of a Labrador and a Weimaraner" quoted directly from that page.
She goes on to explain why SHE believes that, but the information is certainly not definitive. The AKC allows them to be registered as purebred Labrador, and therefore has not accquired enough information to believe that they are not. That's why I have a problem with the title of that page being "The TRUTH behind Silver Labradors." The "truth" is, all my puppies come with AKC registration papers saying they are a purebred Labrador. Just because they cannot compete in the show ring, does not make them a mixed breed. It is possible for two purebred, champion Labradors to produce a puppy with a white spot on its chest, or some brindle markings. These characteristics also disqualify the dog from competing in shows, but most certainly do not disqualify it from being a purebred Labrador. Here's a quote from the Labrador retriever Parent Club's website. The "dudley pigment" refers to the dilute coloring or the nose, and skin.
"In any case, the Dudley pigment does disqualify him from competing in the conformation ring but has no effect on his entering other events such as Hunting Retriever tests, obedience trials and Agility. It certainly has no effect on his ability to become everything else a Labrador retriever should be and surely has no effect on your love for him. "
We are upfront and honest with all of our buyers. Most of them have already done the research themselves, but we tell them anyway. I just don't want people to think that we are being deceptive, or trying to pass off mixed breed dogs as purebreds or scam anyone out of money. Your post on this thread certainly implied that. That is not the case at all, just wanted to clear that up.