They're sniffing for smokes and cell phones behind bars.
The South Dakota Corrections Department is showing off its two specially trained dogs.
The Labrador retrievers came from an animal shelter a year ago.
Sadie and Toby were put through their paces yesterday.
They ignored a TV and CD player, but were able to locate a can of chewing tobacco, a pack of cigarettes and two cell phones.
Tobacco has been outlawed in the state's prisons since 2000.
Cell phones are banned because they can be used to plan future crimes.
Chief Warden Doug Weber says some "knuckle heads" will always to try to get the banned items smuggled in.
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