That very much depends on what the dog is smelling, how strong the smell is, and the wind direction.
Yes.
around 300 to 550
Dogfish sharks have an excellent sense of smell and can detect odors from up to a mile away. They rely on their sense of smell to locate food, identify predators, and navigate their environment.
it can smell as far as 16 yards away
Wolves have been known to smell objects as far away as 1.6 km. An object does not have to be far away for a wolf to smell it, though - they can smell something right next to their nose.
they have intense smell.
They just smell when you're near
grate whites can smell blood far from 1 to2 miles in water
how far can cheetahs smell
If you are trying to identify a pill by the smell, you will not get far. There is no normal smell for penicillin.
because when you are cooking the smell of the bacon and the patties give this smell
A Lioness can smell things from 30kms away.