WHY DOGS?

They are better at it than we are.

Olfactory Sensory Receptors

Humans
6 Million
Dogs 
250 Million

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Sensory Receptor Surface Area

Humans 
1 square inch
Dogs
30 square inches

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Part of the Brain that processes Olfactory Signals

3 times larger in dogs than humans even though their brains are 10 times smaller

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