Elizabeth,

Although I mostly work with younger infants, I have had some luck with using
the suck training techniques as taught by Chele Marmet for babies that hump
up their tongue.

Using the most appropriately sized finger (no long fingernails) , pad up I
elicit a root and GENTLY introduce the finger along the palate so as not to
gag the child.  I slowly stroke back just a little on the hard palate then
down on the tongue and usually within a minute or so the child learns to
stick out his tongue more to suck on my finger.  If possible I have EBM in an
orodontal syringe to reward proper sucking action.  The technique needs to be
taught to the mother with a return demo so that she can remind the child when
required.  I stronly reinforce the need for mothers to follow-up at the WIC
breastfeeding clinic as these women leave the hospital so soon after birth.

Hope this helps,
Sharon Coe LVN  IBCLC