I'm sorry you are having a hard time with this litter.
What a shame!
Just for future reference check out www.carecredit.com
for financing vet care (can be used to finance people care too and its only for health care) so it can be paid off slowly.
I didn't realize you had a whole litter as chi's so often have just one.
If the puppy acts oddly and has a high domed skull it may be that her vision is being impacted due to pressure on her brain from a condition called hydrocephalus which is seen in this breed.
This site has some info on it for you to read through
But it might just be a birth defect or an infection causing an issue.
I can tell you a blind puppy can do fine as a pet in the right home where it won't be allowed to run loose unfenced and where it will have an owner who understands how to train it and help it learn how to get around.
Having a puppy with a problem and losing pups is one of the very hardest thing about being a breeder if you love the little dogs (and its sounds like you do).
Can you describe for me a little more about how the eyes look? Is there a discharge? Do they look cloudy or red? Do the pupils look totally dilated or totally contracted?
Was this by any chance a litter of merle pups?
Maybe some more info will help me figure out something you can try.