They say that a cat's whiskers are supposed to be as wide as the cat is wide, they are supposed to help guide them and when they are out hunting, etc it lets them know holes and crevices they should be able to fit through. So technically, a really fat cat should have really long whiskers. I notice that my big Allen boy has l-o-n-g whishers, and the little Pouncer has been developing some loger ones lately too.