Thanks to all for your comments about the minimum frequency of feedings a
mother who is mixing breast and abm feedings needs to keep her milk
composition normal.  Most of the replies I got were about weaning milk,
and suggestions were made that when the baby increases the number of
feedings, the composition would change back.  However, I really was
referring to mothers who plan to continue a fixed number of
breastfeedings and abm feedings, and won't be increasing their nursing.
I gather that there is some offsetting of the potential problem of elevated
sodium if the feedings are infrequent in that that means more feedings of
abm, but there appears to be no data on this issue.  I am also assuming
that there are no adverse health effects of this practice, since in the
Jones study of day care exclusion from illness, the babies who got
"token" breastfeeding still were healthier and missed less day care days
than their exclusively abm-fed counterparts.  Thanks, Alicia.
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