Jay,

I have an article somewhere that looked at babies who were experiencing
GI problems on formulas containing casein, to see if their symptoms
improved after being fed a formula based on whey protein.  Most, but not
all, of the children did improve on the whey formula.

I have been hunting for this, but I have not been able to find it.
however, I think I posted a reference to it on LACTNET a while back (and
evidently did not put it back where it belonged) , so you might be able
to find it in the archives.

I know the decision of what to supplement with can be precarious, since
everything else is so inadequate in comparison to breastmilk.  There
are, as you said, some babies who will thrive on anything.  I have had
one of those, my first adopted son, whom I only nursed part time and
never had a milk supply for.  I've also had one who did horribly on
everything but one type of milk.  In "sticking up" for the goat milk, I
was not just trying to justify what I did.  I was trying to demonstrate
a need to be flexible if the standard remedies to things do not have the
desired outcomes, as well as the need to give mothers the right to make
educated decisions, even if they are not accepted by the traditional
medical community.  Not long ago, it was such things as breastfeeding on
demand and for more than a few months that was considered to be
something only uneducated people did!

Aloha,
Darillyn