An automatic stack feeder having a moveable stack or product guide is disclosed. The automatic stack feeder may be configured to receive a stack of articles and a container enclosing a stack of articles. To ensure the stack of articles is properly supported following unloading from the container, the stack guide is moveable between a first and a second position, wherein the stack guide is in contact with the stack of articles while in the first position, and not in contact with the stack when in the second position.