It may not be the best photo, however, it is in fact tubular like tissue growth that is dark at the leading edge. It is not a tear. It did come on quickly and it has gotten a bit longer but not as plump. I've been putting antibiotic on it and have been monitoring it closely.
My Coro hen has developed this growth. It is not oozing and is definitely tissue. She's had it for 2 days. I've put anti bacterial ointment on it. Anyone seen anything like this? It is not a tear and is not filled with puss or fluid that I can tell. She is not in distress when I handle it.