Denver-based Smart Cookie makes all-natural small-batch dog treats from scratch that are available for purchase online and at many local pet-supply stores. But with luck and a little research, you and your pooch just might happen upon the Smart Cookie Barkery Cart — a treat-vending cart on a giant trike — at a variety of flea markets and other public events around town. Or you could throw a doggie birthday party and hire the trike to come to your home. If food trucks are for everyone, shouldn't dogs have their day, too? Hell, woof!