I just dont believe their nose is the best. I think its a tie between hearing and vision. This year been doing some expiermenting. I have a bow blind set up with a bait pile not 18 yds from me. No cover scent and blowing cigarette smoke out the window at them and it doesnt seem to bother them. But damn I had a 8 pointer spook as soon as I drew my bow, that little noise of the arrow sliding just freaks them out. Or even a slight body shift in the blind and they hear me. As I watch them, they are always flicking those ears and eyes in certain directions, scanning with both. I dont think their nose is all that. I think its a marketing skeem to get you to buy cover scents and scentless clothing. What do you think is their best sense.