Frontier Airlines joins the ranks of smarty-pants discount airlines -- like jetBlue and Southwest -- with a new campaign from Grey/New York. The comic effort is currently airing in Denver and will rollout nationally in September. The campaign features humorous conversations between the animals that adorn the tails of Frontier's planes. A dolphin is upset that he's getting sent back to Chicago while the bear gets to go Florida, and a rabbit tries in vain to seduce a foxy fox. The campaign -- directed by Steve Marino at Voodoo Design & Visual EFX -- introduces the new tagline, "A whole different animal."