article_snippet: While the human brain is dominated by a large visual cortex, dog's brains are dominated by an olfactory cortex.
article_snippet: The olfactory bulb in dogs is roughly forty times bigger than the olfactory bulb in humans .
article_snippet: The average dog has 125 to 220 million smell-sensitive receptors.
article_snippet: The average dog exceeds this standard with nearly 300 million receptors.
article_snippet: The average dog is estimated that dogs in general have an olfactory sense ranging from one hundred thousand to one million times more sensitive than a human's.
article_snippet: In some dog breeds, such as bloodhounds, the olfactory sense may be up to 100 million times greater than a human's.