This engaging documentary immerses the viewer in the forests of Northern Italy, where dogs, accompanied by their elderly, often irascible human owners, scraping by on modest means, seek the precious white Alba truffle. Among the most coveted delicacies in the culinary world, this pricey fungus only makes its way to the plates of wealthy restaurant patrons thanks to the olfactory skills of these heroic canines. A depiction of both a ritualistic, outmoded way of life and the wild economic disparity of a situation that can lead to acts of greed and cruelty, The Truffle Hunters is revelatory, earthy, and altogether humane. A Sony Pictures Classics release.