Try in the Parameters tab, clicking on the options (drop down menu that looks like a piece of lined paper) and select Show Hidden. Make sure the hair is the selected item, then dial back the auto-follow generated morph.
Please note that this won't work if the head and ears morphs are set as a single morph. You'll need them as two separate morphs controlled by two different dials. Also, this way the hair may poke out from inside the ears, but there's not much you can do to fix that since it depends on the way the hair was modelled.