did you give her vitamins or anything to help her immune system?( I'll pm the whole article as it is pretty long)is from a friend of mine, i have other health stuff on my byc page- the second page, down at the bottom is respiratory stuff
NUTRITIONAL/VITAMINS:
To help tackle a respiratory illness, I keep in mind that the body needs fuel to do its job.  Not only is the bird still having to nourish itself to survive, but there's the extra stress of providing materials to fight the intruder - the pathogen causing the illness.  There are certain nutrients that boost the immune system and increase healing for respiratory illnesses and I like to take full advantage of them.  Anything that I can do to boost the chicken's immune system, I will do.
Vitamin A (and its precursor beta-carotene) is one of the weapons in my arsenal against respiratory illness.  Vitamin A is a most important vitamin for ocular, mucus membrane, and respiratory health.  It is so important to the chicken that a lack of sufficient vitamin A in the diet can actually CAUSE respiratory illness.  So it's one of the first nutrients I make sure to supplement to an ill bird.
If the bird doesn't have caseous nodules (yellow-whitish pimples) in the inside of its eyelids, mouth, throat, etc, you can simply treat with a more broad spectrum oil type vitamin liquid.  Because vitamin A is an oil vitamin, I feel that using oil or liquid/oil sources is more effective than dried sources.  So I prefer a vitamin like PolyViSol baby vitamins (Enfamil brand) used in the individual bird's beak daily.  Don't buy the iron-fortified, but the non-iron-fortified.  You can find it in the vitamin section of many stores, including 
Walmart.  For a chick, it's 1 drop in the beak for 7 days and then taper off.  For a young or medium bird, 2 drops.  For a larger bird, 3 drops.