Diane,
In my experience, some babies bite when (1) their heads are still quite
molded or asymmetric.  This is probably nerve compression -they probably have
headaches. I've had tremendous success with a local D.O.'s therapy when there
is any cranial bone asymmetry, prominent or overrriding sutures or molding
beyond 1 week of age.  (2) birth injury itself can cause a headache, and I
think some kids bite because it stops the head pain. Try different postures
such as upright and possibly cool cloths on the baby's head - might help
relieve some subtle swelling. (3)  Another theory is they're trying to keep
nasty stuff out of their mouth, like rigid objects - sort of a control issue.
I've had good luck with gentle cupfeeding because I think it gives the baby
more control over intake. (4) In any case, keep this baby off the nipple - no
sense in damaging tender tissue! My personal recommendation is pump and
cupfeed very respectfully (nothing to clamp down on) and wait.

Linda Smith, BSE, FACCE, IBCLC
Dayton, OH