Aww.that is fantastic work you have done with a hound, especially when you had no prior experience!
My pooches are huge sniffers and I know its tough to get their attention. Just be happy you don't have a beagle like mine that "hunts" on our walks for rabbits, gets a sniff and howls so loud it must wake up the whole neighbourhood! It's comical to watch (I think in his former home he was a hunting dog) but man the neighbours probably don't appreciate it a 6am in the morning!