One of my chickens has developed a lump on her beak - not the white bits, they are cottage cheese, which she loves.
She has been on antibiotics and vitamins for the last week, because she was very lethargic. She is much more chirpy now, but she is not eating very much. I think the lump hurts when she tries to eat.
Any ideas what the cause is and the treatment?

She has been on antibiotics and vitamins for the last week, because she was very lethargic. She is much more chirpy now, but she is not eating very much. I think the lump hurts when she tries to eat.
Any ideas what the cause is and the treatment?