This week, host Richard Wiese is in Harrisville, New Hampshire, to see firsthand why border collies are known as the world's smartest dogs with master shepherd David Kennard. In Massachusetts, host and Yankee senior editor Amy Traverso explores the preservation and expansion of the Jewish deli tradition. And we visit the What the Fluff? Festival to celebrate the tasty icon of many New Englanders' childhoods: Marshmallow Fluff.