23, 2020. What do dog noses have that humans don't? They possess up to 300 million olfactory receptors in their noses, compared to about six million in us. And the part of a dog's brain that is devoted to analyzing smells is about 40 times greater than ours.Jul 23, 2020 https://phoenixvetcenter.com › blog How Powerful Is a Dog's Nose? - Phoenix Veterinary Center 23, 2020. What do dog noses have that humans don't? They possess up to 300 million olfactory receptors in their noses, compared to about six million in us. And the part of a dog's brain that is devoted to analyzing smells is about 40 times greater than ours . Jul 23, 2020 https://phoenixvetcenter.com › blog How Powerful Is a Dog's Nose? - Phoenix Veterinary Center What do dog noses have that humans don't? They possess up to 300 million olfactory receptors in their noses, compared to about six million in us. And the part of a dog's brain that is devoted to analyzing smells is about 40 times g...