A story like this sounds like the work of a trained K-9!  Instead, it was a couple of loose dogs that lead cops to a big pot bust.

A loose  pit bull and German shepherd took police back home to a big time pot growing operation.

Justin Sullivan / Getty Images

The police chief of  Duluth Townships Police Department said he found the dogs, and when he went to return the pups to their rightful owner, he smelled a strong marijuana odor from the trailer.

A search warrant was issued last Thursday and led to a bust of a $100,000 marijuana operation.

A father-son team had 77 marijuana plants, grow equipment and video monitoring devices.