Zebu have humps on the shoulders, large dewlaps, and droopy ears. Many mammals such as dogs, rabbits and moose possess dewlaps. Dewlaps on their briskets are rarely found. Examples of these are the usage of dewlaps and crests in lizards, dinosaurs and birds. The breed has loose skin, large dewlaps, and non-cartilaginous (soft and floppy) ears. Some species have deep blue dewlaps and communicate with ultraviolet signals. Show dogs have longer fur and more pendant ears, dewlaps and dangling flews. Caruncles in birds include those found on the face, wattles, dewlaps, snoods and earlobes. Although these masses can be referred to as dewlaps, they are formed by stored fat. In many individuals, the dewlaps proceed to the chest and abdomen. Many birds also have dewlaps, such as domestic chickens, some cracids and some guans. Within this definition, caruncles in birds include wattles (or dewlaps), combs, snoods, and earlobes. Dewlaps are sometimes present in Does, but are penalized in showing for bucks.