Children usually do not stop eating weeks at a time unless they are not feeling well. Suggest going to a Pediatrician (not the Hospital ED) and getting her checked/tested medically and treated if something is wrong. The EDs at hospitals help to stabilize the patient but it is our responsibility to follow-up with our own MD.
my son is 4 and just over 30lbs. There were a couple of times he didn't grow between well visits. They tried to test him for UTI but I do not know why exactly. Something about UTI's affects their eating is all I remember. This is about 3 yrs running.
has she been tested for UTI?