I am so glad to hear that you got your daughter out of there. Did you put her in a private school?
This story reminds me so much of my younger cousins. This was in the early 80s. I was a bit older at the time and they were very small - probably in 2nd and 3rd grade. I remember visiting their house for a week (I was 14). They were never strong, healthy girls to begin with because their mother was a bit of a ditz with their diets. (She was a single mom who worked full time). But they did all right, I suppose.
But the sweet little 2nd grader would cry at dinnertime. She would cry that she couldn't eat the meat on her plate because her teacher told her it was bad and that she was bad for eating animals.
I was so sorry for her. She was so pale and thin and really could have used the iron in the red meat. My Mom and I did our best to convince her otherwise. Her mother couldn't be bothered.
Sigh.