If America is looking for a sweetheart, we have a prime candidate. Adelaide, the unaccountably sweet and goofy yellow Labrador, is an undiscriminating purveyor of love, mirth and moral support. She is wagging her way to world peace following a grassroots strategy: One dog, human, cat and child at time. At her current pace, she could be done in a couple of weeks. She’s potty-trained, takes the stairs, probably rides a horse if it would make someone happy. Make your home her headquarters and Adelaide will make your heart sing.