If the sum total of your dog's contribution to the household is lying around waiting to be fed, take a suggestion from the owners of these costumed canines. Dogs dressed up for no reason at all — OK maybe for Halloween — will give your canine a reason for being. Even Chihuahuas have a use, when you're, say, in urgent need of a chivalrous jousting contestant. Out of frequent flyer miles? Take the Boning 747. Can't afford a real tiger to guard your pool? Then simply doll up your golden retriever and put that pooch to work — we're sure he can find a little time in his crotch-sniffing schedule to accommodate you.