This is runt, she is a 10 week old brahma. I'm pretty sure she is some type of dwarf. She is still mostly fluff but does have some feathers on her wings and pin feathers on her tail and head. At 10 weeks she is a little smaller than my 5 week bantam. I don't see the traits for a thyroid issue so hoping she is just that rare dwarf. I got her from a local breeder who has never had a dwarf before. The other chicks in the picture are the same age.