I apologize for this being a bit long, but I wanted to comment on several things I have read in this thread. Which, by the way, answered a question I had and was going to post about in new thread.
We are in the last week of switching Levi (7 mo.) and Zoe (4 mo.) from Purina Pro Plan Large Breed Puppy to Canidae. The switch was mainly prompted by Levis' getting an infection that the vet could not find a reason/source for. During that time he started showing signs of Demodex, and I again turned to BW and our vet for information. Although Levi's outbreak could have been triggered by the stress of Zoe's coming into our family, she walked in an proceeded to take over all of Levi's possessions, toys, food bowl, and
his bed.

Anyway having read the messages about what is and is not a sound and healthy food for them coupled with the possible immune system trigger for the Demodex, was what prompted our decision to change their food. They just started the 3/4 Canidae to 1/4 Pro Plan mix today, and so far they have taken to the Canidae very well. So much so that they will pick out the Canidae and scattered the Pro Plan in the floor.
Having seen some mention feeding Large Breed Puppy Food, I do want to share what I was told the other night at obedience class. This person breeds Bulldogs and has seen several of the puppies grow up to be companion dogs for the handicapped. His comment was that given the possibility/tendency for hip displacia (sp?) that Large Breed Puppy/Dog Food was not good for them, since it accelerate growth and could cause problems. I had never heard of this and would have ran it by the more knowledgeable people here if we were not in the process of switching. I guess the question now is, should we start a new thread about any pro's/con's of Large Breed Puppy/Dog Food?
Sorry for this being somewhat rambling and a little long, but I just could not clearly say what I wanted without the explanations.