Can you post some more pictures? Are you positive that she has no respiratory symptoms? Is she still with the other chicks? I would probably separate her if you haven't. Is the awelling around the eye firm or soft? Was she vaccinated for Mareks disease? Mareks can cause tumors anywhere in the body, inside or out. Sorry for all of the questions, but this seems to be a strange case. I would wonder if the growths were not containing pus. You can try to lance one of those and then squeeze to try and express what is inside. Pus or hardened yellow pus could come out, or blood if it is a cyst or tumor.
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