Respiratory disease???

[The chicken lady30]

My hen for the past 4 days has been going abit downhill.
Rest of the flock are fine, but this one has been abit lathargic and her comb has been getting darker (purple)

Her only sympton is head shaking from time to time, she wants to eat and has been drinking but today shes just pecking her food, not really interested in it.

No idea what this is....also shes not laying.

 

[The chicken lady30]

 

[The chicken lady30]

 

[LozzyR]

Aww, poor sweetie, no, she doesn't look well.

I believe a purple comb can indicate heart failure? It's not something I've had experience with. She looks like an ISA Brown, did she go off the lay suddenly? It could be egg yolk peritonitis, or she's egg-bound. Do you have access to an avian vet? I've not had to deal with egg binding, but he EYP I have experienced was fatal. I hope you and she are able to get some help.