![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgyx7RYLr6wFy2jPpuNt3Lx-HbDH1vlP3m4RhDo2MCyC3qItV_pZzsZejs1cfCaRDVOk66Th7lEGUPBJvqvJ55njRmNsuAKKOaWEji_bd0s2ur7kk1x1_rBOGnVE4VhwnWZl1iacWoQVJlu7Qol/s1600/dupolrat.jpg)
Detective Derrick and his rat partners are capable of being trained to identify an impressive range of odors - including drugs and explosives. The rats are kept in a cage with four metal tea strainers attached inside, one of which contains gunpowder. When the rat recognizes the smell, it is rewarded with a small treat. Eventually the rat will learn to move towards the smell instantly.
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