Look at the comb colours of the old hens mentioned in my previous post.
Why? I really don’t understand why you interfered., it seemed like her friend was just helping her tend a spot that she could not reach herself? So I decided to rub some of the purple pick no more and antibiotic ointment on the area.
I would give her time to recover and maybe give some extra nutritious treats. Chickens that stopped laying don’t eat much.