Well.... It still could be a Serama, if it turns out to be a class C then it will likely be bigger. I have three Serama babies... know they are purebreed and one of them is a LOT bigger than the other two. I swear it's as if no one told the dang chick it's a serama. My two little ones are, at 11 days old 3/4 oz and 1 oz and this guy is 1 7/8 oz. He is tall too. I swear he is going to be a roo. He just has that look.
