Yes, I've seen it. Incidentally, every ABM product on the market is
documented to have triggered this at least one time in in a baby, even the
"non-allergenic" and hypoallergenic stuff. This is unlikely in a totally
breastfed baby - the baby must have a very strong history of allergy and
possible exposure to it earlier on. Even a taste of something can set up a
sensitivity in some people.  The more you get, the more likely you are to
react. Wanna bet someone offered the baby "just a taste" of something? And
more than one time?  Triggers can change, and reactions can change.
Allergy-caused colic in infants from dairy can become asthma in teenagers
triggered by molds and eczema in adulthood upon contact with cat dander. Same
underlying disease/condition. And 1+1= 3, so the more triggers, the greater
the reaction.

A few years ago I discovered that I'm allergic to peanuts. Even potato chips
cooked in peanut oil will trigger violent headaches about 8 hours later.
Peanuts and peanut oil are in lots of foods, which I found out the hard way.
Corn's another omnipresent allergen. The most common one is dairy products -
whey, caesin, and milk products. In 1974, a mom with baby # 2 rented a pump
from me, desperate to provide her milk. Told me that baby #1 had been given
ABM by a night nurse two nights in a row, without the mom's permission and
against her written instructions, then had an anaphylactic reaction to the
third bottle of it and DIED.  I will never, EVER forget this mother or think
"a little ABM won't hurt."  Serious stuff, folks.  Allergy isn't funny or
trivial.

Linda Smith, now needing to read labels even more carefully.
Dayton, OH private practice