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The animals help law enforcement by detecting the presence of illegal substances like ice, ecstasy, speed, cocaine and heroin. An indication from a sniffer dog can be enough for police to search you for drugs. (An indication is when a dog signals to its handler - by sitting down, usually - that it smells something.)
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Drug dogs help airport authorities, border patrol and the police to locate illegal substances.

As a dog's sense of smell is highly sensitive, they can usually find drugs that have even been hidden in foil and plastic.

Place the ball in a bag or a box along with the scent that you would like the dog to locate.

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