I am so glad to hear this! I just discovered a wound on my hen caused by who knows what and it was hard like yours. I’m hoping Veterycin, triple antibiotics and amoxicillin helps her.Update, she recovered. We had to drain the would, clean her, put her on a small amount of antibiotics, seperated her for a few weeks and regularly cleaned the wound.
( I also hope I don’t have to drain it because I’ve seen a lot of people saying it needs to be drained. I don’t see any pus either. It’s just hard and scabbed up in the middle like yours.