I agree with what ChickenChick said above: it sounds like this one was failure to thrive and would never have made it, or if it did, would always be tiny and have problems....She arrived much smaller and weaker than the rest, and despite giving her electrolytes, Nutri-Drench, egg yolk, warmth, and lots of love, she passed away.
She just never quite perked up like the others—lethargic, withdrawn, and not eating or drinking much on her own. It breaks my heart....
I'm sorry you lost her. I wish you good luck with the others!