In a message dated 96-12-09 17:05:01 EST, you write:

<< other than the upper respiratory infection which is clearing=
  up due to the penicillin derivative she's taking. >>
Could it possibly be sensitivity to the penicillin or other cold meds child
may be taking?
On the other hand, toddlers are notorious for trying acrobatics etc and
pulling away when they hear something on tv or whatever and relatching again
and again.  (my dtr is 27 mos - I am living this) . This could be the
problem.  Mom may have to teach child some gentle bf manners.
Laurie Wheeler