Dignosis Needed Please.

One of our goldline chickens is not as perky as usual.  She is spending a lot of time in the coup away from the others.  She has discharge from her nose and has raspy breathing.  One of her wings is matted - looks like its got wet and not dried out.  Any help/advice would be grately appriciated.

Thanks for speedy reply, will pop her off to the vets in the morning, in the meantime will try to sleep without worrying about her!!