UMBAGOG LAKE, NH Howling with anticipation, one of Mahoosuc Guide Service's Yukon huskies waits for the rest of the team to be hooked into their harnesses so the mushing can begin. Hardworking and well tempered, guide Polly Mahoney calls their dogs Yukon huskies, because they are descendants from the original dogs Mahoney bred three decades ago when she spent ten years living a subsistance lifestyle in the Yukon Territory.