From incessant meowing to rolling on the floor, find out what your cat's trying to say to you
Don't approach. Your cat is upset and is on the defensive. To calm a kitty that regularly reacts to potential threats by hissing, try Feliway, a diffuser containing a synthetic version of the feline facial pheromone (from $36; entirelypets.com).
Photo Credit: Flickr/ moohaha