Animal advocates are banning together, hoping to whisper a little message into President Obama’s ear: Bo Needs a Friend.That’s actually now an official campaign to get the First Puppy a playmate, with its very own website.Organizers, which include representatives from Society for Prevention of Cruelty to Animals, Los Angeles, Best Friends and the Companion Animal Protection Society, are trying to organize a letter writing and email campaign so that the First Family will adopt a shelter dog to ke