A feed dispensing assembly (1000) comprising: a cylinder (200), the cylinder (200) having a first end and an opposite second end; a base (100) mountable to the second end of the cylinder (200); and a locking mechanism (370) for locking the base (100) to the cylinder (200), the locking mechanism comprising a plurality of circumferentially spaced locking formations (370) arranged at the second end of the cylinder (200) and an equal number of circumferentially spaced locking components (175) carried by the base (100), the locking mechanism (370) being configured to lock the cylinder (200) and base (100) together in only a single orientation relative to each other.
