Okay, so I noticed that my Barred Rock (my favorite chicken, she thinks she's a dog) has this thing on her nostril. She is 4 months old. I first noticed it about 2 weeks ago. It has gotten bigger, and I'm starting to worry. There are no other symptoms with it. She eats fine, is active, doesn't have a runny nose, her eyes aren't swollen, and her head doesn't smell unusual. It feels hard, not squishy, and is over the front part of her nostril, but doesn't seem to affect her breathing, yet. Just as a side note, all my chickens were on a Sulmet treatment for 6 days. That treatment just ended 3 days ago. It was due to a young chick that had symptoms of coccidiosis, so I treated them all. What the heck is this, and what should I do? I read on here about other people that had something similar to this, and removed it themselves. I am tempted to try removing it (as I certainly don't want it getting bigger and start blocking her nostril), but wanted a few people's opinions first. If I remove it myself I will take pictures and post them so that others can learn from this experience.