It takes this dog about 5 minutes to cover what appears to be at least a hundred yards - BUT, it finds this guy in a tree stand ... Watch as the dog locates the hunter's scent in the air - when the dog gets close to the treestand.
If the dog can smell him in Scent Lok, a deer can too ...
http://www.youtube.com/watch?v=NXp3kv8fs_0