Welcome to the Westminster Dog Show, where the size of the dog in the fight has nothing on the level of confidence, preparation and genetic perfection of the dog. This week, a small but mighty canine named Bono took charge of the AstroTurf, handily walking away with a win in the toy group against his fellow diminutive dogs, sending the floppy-haired, inquisitive Havanese — all two pounds of him — to the final Best in Show round against six fierce — yet furry — competitors: Bourbon the Whippet, Siba the Standard Poodle, McDonald’s fuel Conrad the Shetland Sheepdog, Daniel the golden retriever and two more selected from the working and terrier groups that evening. But Bono, who is all of two years old, wasn’t pressed by the excitement.