Design is science, they fail and go back. Doing the same thing over and over again hoping for a different outcome is the definition of insanity.. Oh wait.
Spaniels can smell nasty if you live in a cold wet climate. They love rubbing themselves in the woods to go into contra hunting mode, smelling like the dead.
Dogs that shed naturally smell less because they keep getting rid of the body oils. Again, doesn't work if they like finding wet spots to relax.
Thanks