One thing that working in a shelter has proven to me is that different breeds have very distinctive smells. I can smell the GSD smell in a GSD mix. We all know beagles have their own special kind of odor. I can also smell "lab." Probably some other breeds too.
I have often said that my two dogs smell so different from each other. Tar just never stinks. I can brush him good and he is as clean and shiny as a new penny. Jocasssee on the other hand definitely gets the lab funk going on and requires soap and water more often than Tar.
Jocassee..Labrador Retriever 11-12-09