Can I bring in drug dogs?

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I have a problem tenant I'd like to get rid of, and if I had to make a bet I'd say they have illegal drugs somewhere in the unit, but I can't prove it. Of course, if I could prove this it would be immediate grounds for eviction.

Question is, am I allowed to hire a private drug dog to come in and sniff around? I am using the North Carolina standard lease, which basically gives me the right to enter the unit at any time without notice for an inspection...can that include bringing trained professional drug dogs with me?