I have a 12 week old black runner duck. I noticed this morning that there is a growth on his bill right where it connects to his face. I caught him up and looked at it and it looks and feels "fleshy". It does not seem to affect him in any way, but I am concerned it will grow to cover his nare and/or eye. It reminds me of a caruncle, like muscovies have. I am going to try to attach the best picture I can. He is not very cooperative.
Sorry it is blurry. He is the one in the front.
Does anyone have any idea what this is and how to treat?