If the dog is showing some fetch, seems to be smart, and comes from good stock, I would put some black paint on its toe and take it home. I like to see lots of retrieve in the puppies. In my opinion a pup that likes to retrieve and has that drive, ends up keeping that drive. When I picked out my hunting dogs, I always took a grouse or quail wing with me. The pup that showed the most interest, and brought it back the most when thrown, went home with me. I have not had any bad picks yet.