I just wanted to share this link. I missed the show but a coworker was telling me how they were discussing things about breeds in the show world and how they are breeding for the looks of the dog rather then the purpose the dog was supose to do. Also about genetics in dogs. If you click the program transcripts to the right you can read some things that they showed in the program, their was a section their on retrieving,tracking and pointing dogs.
If you want to do some reading or browsing here you go: www.pbs.org/wgbh/nova/dogs