I have a Wyandotte that is about 16 weeks old. In the past week or two she has started to develop a growth on the top of her beak. The bottom of the growth looks like beak material and color. As it get further away from the body the growth is white. The whole thing is not huge but looks like a large white head you might see on a teenager. Any thought on what it could be and whether it can be hazardous to the girl's health? Thanks.