Chicken help, again unfortunately

Hello,

Unfortunately I am back again. My chicken has been through 2 rounds of medicine (erythromycin and another which I don’t know the name of but a farm owner gave us), nothing has helped this resolve. I have tried applying pressure to remove the puss but nothing comes out.

I have called all the vets in my area and the surrounding cities, and no one takes chickens. They won’t even do a phone consultation.

What do I do now? She was eating and drinking okay, but now her mouth is being forced open by the swelling so it’s getting more difficult for her to eat. I can’t even stomach the thought of culling I have gotten too attached to her.

Any advice?

Thank you