Why only use big dogs as sniffer dogs?

Wouldn't a Chihuahua do instead? Also, decoding conversation and Covid-19 links to diabetes.....
29 October 2020
Presented by Chris Smith with Jeremy van Wyk, 567 CapeTalk. 
Production by Chris Smith.

CHIHUAHUA-DOG

CHIHUAHUA ON THE GRASS

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Vitamin D for coronavirus? Narcissism and the brain. Why use big dogs as sniffer dogs? Understanding conversations in noisy places, and why that gets harder as we age. Why does my hand itch before I receive money? Is the new coronavirus linked to type I diabetes in children? And attaching significance to coincidence! Join Dr Chris on 567 CapeTalk for all the answers...

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