Anyone know what this is?

[cunderwood]

 

[cunderwood]

 

[cunderwood]

 

[cunderwood]

Her head is slightly swollen on the top, almost like a lump. She's the only one in my flock? Any idea what it is?

 

[donrae]

Looks like a partial crest. Someone back in her family tree was a tophatted bird.

 

[cunderwood]

It seems a lot more like some kind of growth :/

 

[cunderwood]

I got all of my chicks from the same place, for this breed she has two sisters and they don't have this. I guess it's possible to not of come from the same hatchery place. Just wondering if it is a growth of need to drain and keep clean and sanitary. It doesn't seem hard, more softer.