Worms coming out hen's backside UPDATE

[hokankai]

Does it have a smell? (not poop smell) If so, it could very well be necrotic tissue. Necrosis can be extremely dangerous and can be a sign of anaerobic bacterial infection. I've always learned to remove all necrotic tissue, as it will affect the other tissue around it. Is that possible to do?

 

[EggyErin]

There really isn't much smell but it seems like all the dark tissue must be necrotic. What else could it be? I have no idea how to remove necrotic tissue and am afraid that would be over my head. Do you have any suggestions or directions?