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I'm not aware of any studies comparing the power of the sense of smell of a deer to that of a dog. Most experts believe it to be very similar to that of dogs. Like dogs, deer are oalfactory animals. Humans are visual, dogs and deer use smell as the primary sense.
Studies show that while some aspects of a dog's sense of smell are at least 100 times more acute than humans, the detection of some other chemicals in the air is more than a million times more acute than humans.
It is very difficult for us to understand what it must be like to walk around perceiving the world like that. Imagine knowing who walked over your lawn 36 hours ago by simply sniffing a couple of times. Imagine being able to find avalanche victims burried under many feet of snow by just walking over the area and sniffing.
Imagine how stupid it is for someone to think he could hide from such a nose by putting on a plastic suit.
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