Wondering why this would go so long....was it not treated between 9
and 19
months.  Did I miss something?

My dear friend  and mother of 5 had two children who looked like FTT
at 3
and 4 months consecutively.  One child was even admitted to Miami
Childrens Hospital and worked up..  Low a behold the culprit was corn
syrup
in maternal diet, along with dairy.  For the last baby, my godchild,
SX of
sensitivities to foods developed early, esp to dairy and corn syrup
and with
this one even wheat.  Mom eliminated for a couple of months and
reintroduced gradually these offenders to her diet.  Soon Mom was
eating
whatever she pleased and  baby doll (birth weight 7.1) weighs a
whopping
13.15 at her four month check up!