Just make sure there's no awful smell associated with the discharge - if it's putrid, that's a sign of coryza. We're dealing with this right now. Is she breathing OK? Eating?
Be aware that water-soluble Tylan may not work if she's not drinking. We've been using the injectable Tylan-50 (1cc/day subcutaneously) for a week with little effect, but at least we know she's getting the medication. We are also mixing the Tylan-50 with water (12 cc's water : 2 cc's Tylan) and using that to flush her nostrils and the one swollen eye. If you do that, use a needle-less syringe and hold her head down a little so when you squirt in the nostrils it will come out the front of her beak instead of going down her throat (injectable Tylan isn't good for them to eat, apparently). For the eye, pull the bottom eyelid down with your thumb and squirt a little of the Tylan solution in there.
I would also encourage you to do a little more diagnosing if you can, to figure out what exactly she has and whether she will remain a carrier if/when you reintroduce her to the rest of your flock. Even if that doesn't influence your decision about whether to treat/reintroduce, it may influence how you let other chicken owners interact with your birds and precautions you take when visiting other flocks.
Good luck!
