The ability to smell  separately with each nostril, smelling in stereo, helps to determine the direction  of the smell's source so that within the first  few moments of sniffing, the dog starts to become aware of not just what kind of things are out there but also where they're located.
Sposobnost da miriše  zasebno svakom nosnicom, njušeći na stereo način, pomaže mu odrediti smjer odakle dopire miris tako da u prvih par trenutaka njušenja pas postaje svjestan ne samo  onoga što se tamo nalazi, nego i gdje se to nalazi.