Funny comb?

[lovinthechickens]

I have 3 dominique pullets(though i think one is a roo). They are the most adorable little fuzzies, but one has a funny comb. 2 have a partially developed rose comb, but this one chick(carly) has a lumpy bump on her head. She is also MUCH smaller, but has more barrs than her sisters...

why?

Pics soon..

 

[silkiechicken]

Pics would be great, every bird can be a bit different though so probably nothing to worry about.