PBS has a new special that both preschoolers and puppies will love-love-love. It's a retelling of the childhood classic Heidi... using dog actors. Strange?... Yes. Cheesy?... Yes. Wholesome, supercute, heartwarming, and funny?... Yes, yes, yes, and yes! PBS used to have a series called Wishbone, with a similar "dog involvement" concept... but this is one million times better: it's all dogs, 100% dogs; there are no pesky human cast members to speak of. It was wonderfully, oddly charming.