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Why do dogs love to play with trash? – Sarah G٫ age 11٫ Seguin٫ Texas

When I think about why dogs do something, I try to imagine what motivates them. What does a dog get out of playing with trash? As a veterinarian and a professor who teaches college students about companion animals, I believe there’s an easy answer: Garbage smells delicious and tastes good to dogs.

Dogs have an amazing sense of smell. They have 300 million receptors for smell in their noses, while humans have only 6 million. People can make use of this sniffing ability to train dogs to detect illegal drugs, explosives and endangered species, and to help locate people lost in the woods.

While you might not like how your trash smells, to your dog it is an appealing buffet brimming with apple cores, banana peels, meat scraps and stale bread. Even used napkins and........

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