A bale processing apparatus include a frame, a bale hopper defining a bale chamber for receiving a bale, a bale shredding assembly including a shredding rotor rotatable in a rotor chamber, and a bale movement assembly configured to move a bale in the bale chamber toward the bale feed opening and the shredding rotor. In embodiments, the apparatus may be mountable on support arms of a loader such that the bale processing apparatus is liftable off of the ground surface, and may include a rotor operating assembly may be mounted on the frame and configured to rotate the shredding rotor, and the operating assembly may include an engine fully mounted on the frame such that the frame and the engine may be removed as a unit from the loader. Other embodiments are also disclosed.