A week ago I received my order of 16 chicks via USPS from the hatchery. As soon as I got them home and settled it was pretty obvious that two of the little girls were much weaker than the rest of the flock. Sadly, the weakest of the two weaklings died on day three. The other little one is still alive and doesn't appear to be in any kind of distress, but definitely, failing to thrive (not gaining weight, barely eats or drinks on it's own and mostly just lays under the heat lamp). Currently, I'm dropper feeding her a mixture of soupy hard boiled eggs mixed with their water mixture which consists of SAV A CHICK probiotics and electrolytes with a little unfiltered apple cider vinegar added in, but nothing I'm doing now or up to this point seems to be helping much. All of the other chicks are growing well and thriving and there are no signs of sickness or infection in the flock. So my question is, do chicks that appear to not be thriving ever make a comeback? Is there a point at which I would be better off just letting nature take it's course and stop intervening by trying to nurse her back to health? Ugh, just when I think that I've read, researched and prepared for every possible chicken curveball that can be thrown at me, I get one that makes me question whether I'm, actually, doing more harm than good at this point. Any advice on this would be greatly appreciated!