Sick Hen

Hello,
Need a little more info,
How long have you had her and how old is she?
When you say she's not laying do you mean she was and isn't now?
Does she have any other symptoms- runny nose, sneezing, sticky eyes, noisy breathing, smelly breath?
Does she feel warm- feel under her wing and compare with another hen?
Has she been wormed?
Are her comb and wattles a healthy pink colour?
Is she the only one with problems?
Thanks.