UPDATE:
Okay, so not only does our poor Apples have a respiratory infection, while medicating her four days ago we noticed that her breast was swollen and fluid filled...she has sour crop too. So my mom started flipping her over and going through the whole thing. Apples doesn't really like yogurt, but we managed to pick up some Organic Apple Cider Vinegar (with the "mother"). So between the vinegar and the Tylan50 she seems to be doing very well, or at least much improved! She's eating more now and drinking plenty, and she's talking to us again. She seems really interested in the baby chicks, and when they peep she tries to cluck at them but it freaks the chicks out (they can't see her and haven't met a big hen!).
So, all in all, things are going well for her! The swelling has gone down and she seems pretty content now that she's being taken care of.
Thanks for all of the help guys, I will continue posting occasional updates as she hopefully continues getting better!