She's 5 years old. She seems to havehave sneezing and breathing hard before which I thought was weird for chickens. She has only shown signs of the red outbreak for a week, when I came back for spring break.
Her face looks like she has either been pecked about or if it is warm and you have mosquitoes around, it could be fowl pox. Of course pox is usually only a problem in summer or fall when it is warm. Where are you located?
Since her eye was swollen along with her sneezing she may have mycoplasma or MG. Does she seem to be doing better?