Jayfeather's stick

Rock's stick is described as being smooth with all the bark stripped off, and having scratches marked on it.

The Fourth Apprentice
At the beginning of the book, Thornclaw finds the stick and begins to use it to help Berrynose and Spiderleg out of the mud when Jayfeather erupts from the undergrowth and says "Hey, that's mine!" eventually Thornclaw uses it to help Berrynose and Spiderleg, and later Rainstorm out of the mud.

Later in the book, Jayfeather uses it to contact Rock, and briefly after having an argument with the ancient cat, destroys the stick by breaking it over a sharp rock.

At the end of the book, when Dovepaw and Ivypaw are going for a walk in the forest, Dovepaw steps on splinters left from the broken stick.