has she stopped eating? sometimes
it happens that there is something wrong in the little chicks body. she is sick in some way. then they die away. it is quite normal. i once saw how an osprey chick jumped on her back in the middle of a wing exercise and literally dropped dead. until then everything seemed to be fine.
in a crisis situation it is usual that people become more or less upset. aren't you Sabsy overreacting a little? i don't seem to understand why..

please write me a pm and tell me what is the matter. it is not very suitable here (for example prayers or any other overflowing expressions of emotions are not welcome). after all this is an observational topic.