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I wonder what the smallest toy dog breed is? Do toy dogs need special care? How trainable are toy dogs?

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What kind of dog becomes a police dog? How does a dog become a police dog? Is a K9 dog a police officer?

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Are dog sleds still used today? If so where are they used? Are they built differently depending on use? How is a traditional dog sled made?

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Is there a way of knowing if a guide dog is working? Can I ever pet a guide dog? Do guide dogs watch for stop lights to turn green?