Crying Wolf is a 1947 Mighty Mouse cartoon.
A sheepdog tends his sheep. All the little lambs are playing and having fun except a little black sheep who is playing jokes. The sheepdog has trouble with the lone black sheep, who's always creating mischief and "crying wolf." The black sheep dresses like a wolf to scare the others and is captured by a real wolf. The real wolf and Mighty Mouse become entangled in this deviltry.