Heat oven to 375 degrees F. Unroll crescent roll and pinch together to form a sheet. (you can also find crescent rolls sheets.) With a knife or pizza cutter, cut the crescent rolls into strips. Wrap the crescent roll "bandages," around the hot dog stretching slightly to completely cover the hot dog. About 1/2 inch from one end of each hot dog, separate "bandages" so hot dog shows through for the "face." Place mummy dogs on a large baking sheet sprayed with cooking spray. Bake 13 to 17 minutes or until dough is light golden brown.