While Lt. Larry Hanson explains how the Department of Natural Resources uses dogs to find invasive zebra mussels, his rescue dog Digger plays with a ball that was the dog’s reward for finding the zebra mussels hidden on a boat trailer Tuesday during a news conference and demonstration at Fort Snelling State Park. Jennifer Simonson | MPR Photo
Meet new zebra mussel inspectors: dogs
ST. PAUL — Zebra mussels often elude human inspectors that search boats being hauled into and out of Minnesota lakes.
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