Hi Pat,
Although I don't have a real answer, I have seen the same thing in my own
baby on a couple of occasions  The dad is right, it really does look like
tiny black strings mixed in with regular breastmilk poop!  The "strings"
were distributed fairly evenly throughout the poop.  I was alarmed at first,
as this had never occurred with my first two children.  We never made it to
the doctor because I gave it the old "let's see what the next poop looks
like test".  The two times it happened, it cleared up by itself.  I will say
that my third baby seems more food sensitive than the first two were even
though they were all three exclusively breastfeed.  Maybe someone else has
some answers...
Lisa Huntze, IBCLC

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