The Polish Lowland Sheepdog, known in its homeland as the Polski Owczarek Nizinny, ranks as one of the world’s most irresistible shaggy dogs. The PON (named for the acronym of its Polish name) is in fact a talented, biddable herding dog whose skills and tousled cuteness continue to “pen” new admirers in every dog-loving country of the world. The PON’s delightful personality shines in his ever-present smile and clever ways. For an owner seeking a smart,...