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 Dogs are trained to use their acute sense of smell to detect human scent in the air. We all lose 20,000 to 30,000 dead skin cells every minute and this makes up our ‘scent’.
A dog’s sense of smell is thought to be a thousand times more sensitive than our own; they have over 200 million scent receptors compared to our own 5 million
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 Together, the dog and its handler form a highly efficient team. Dogs can work in all weathers, day or night, without loss of speed and they can cover huge areas quickly.
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