How are your chicks today??? Is moxie doing any better?? Can you tell if sunshine's symptoms are the same as what moxie is exhibiting?? They sound differnet to me!!
For Moxie, I would try some bugs/worms to see if she will take those since you are having a hard time with the foods. I donot remember if you said egg, but scramble those. You can add vitamins, fruit... Mine take that well. You can get mealworms from pet stores if you have a hard time collecting bugs from yard. If there is green in her poo then you need to be getting food in her as she will not last long. Does she stumble and just nestle down when you try to get her to move or does she just stand?
I do not know about the respiratory...I have had one that has been sneezy for a while, but has no other symptoms and it is not contagious??