The buzz on “The Sheep Detectives” was that it’s a cross between “Babe” and “Knives Out.” Turns out, the buzz is true. Hugh Jackman plays George, a shepherd tending his flock in an idyllic, isolated meadow in the fictional English village of Denbrook. A loner who lives in a camper, George is surly to neighboring townspeople but infinitely protective of his sheep, whom he raises only for their wool.