This documentary portrait of a traveling circus family—populated with performing kids, dogs, and chickens—seems to situate us squarely in Fellini country. But Giarolo and Alice Rohrwacher are up to something far less obvious, tempering the film’s antic whimsy by capturing the dogged determination of the Solunas as they venture by overstuffed caravan from town square to town square, all the way to the Balkans..