We have five or six million scent receptors in our noses, but dogs have up to 300 million, depending on the breed. They also have a far larger area of their brain devoted to their sense of smell, as well as a Jacobson’s organ that helps them detect normally undetectable odors such as pheromones. All of this adds up to a sense of smell that is at least 10,000 times greater than a human’s. It’s almost impossible for us to imagine the complexity of the information they gather with their noses.
Dog walking advice=not letting your dog sniff and explore
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