A few days ago I noticed that my bird has this strange malformation near his beak. I do not know what it is, so I decided to post some pictures here hoping that someone might tell what the problem is and what should I use. Thank you very much!
That looks like scaly face to me, I am no professional but I’ve seen plenty of it in my time. It’s hyper contagious, I once had a male spread it to my whole flock - but it can be treated.