Here is the clinical report from the AAP about feeding babies at risk for
atopic disease. Worth the read -- my take on it was that we need to be much
more careful about "only one bottle" because there is good solid evidence!
This was re-written and published in January of 2008.
Dawn Kersula in Vermont
where all the babies look better in the spring sunshine

http://pediatrics.aappublications.org/cgi/content/short/121/1/183
This clinical report reviews the nutritional options during pregnancy,
lactation, and the first year of life that may affect the development of
atopic disease (atopic dermatitis, asthma, food allergy) in early life. It
replaces an earlier policy statement from the American Academy of Pediatrics
that addressed the use of hypoallergenic infant formulas and included
provisional recommendations for dietary management for the prevention of
atopic disease. The documented benefits of nutritional intervention
that may prevent
or delay the onset of atopic disease are largely limited to infants at high
risk of developing allergy (ie, infants with at least 1 first-degree
relative [parent or sibling] with allergic disease). Current evidence does
not support a major role for maternal dietary restrictions during pregnancy
or lactation. There is evidence that breastfeeding for at least 4
months, compared
with feeding formula made with intact cow milk protein, prevents or delays
the occurrence of atopic dermatitis, cow milk allergy, and wheezing in early
childhood. In studies of infants at high risk of atopy and who are not
exclusively breastfed for 4 to 6 months, there is modest evidence that the
onset of atopic disease may be delayed or prevented by the use of
hydrolyzed formulas
compared with formula made with intact cow milk protein, particularly for
atopic dermatitis. Comparative studies of the various hydrolyzed formulas
also indicate that not all formulas have the same protective benefit. There
is also little evidence that delaying the timing of the introduction of
complementary foods beyond 4 to 6 months of age prevents the
occurrence of atopic
disease. At present, there are insufficient data to document a protective
effect of any dietary intervention beyond 4 to 6 months of age for the
development of atopic disease.

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