I have 4 barred rocks, and 2 bantams all about 11 or 12 days old. I thought the bantams were the same breed, but now I am pretty sure they are not. 1 has been pegged as a Belgian d'Anvers, and the other one is all black, and now double the size!!! The d'Anvers isnt growing, just stands there under the light all by himself, breath's heavy, and lets his (?) wings kinda be lazy.....he does eat and drink water and sleep ok, but something isnt right!! I just know it!!! He seems really lonely in a brooder with 5 other chickens in it. Does this sound crazy? Is he ok??? What should I watch for??? Here is a picture of both bantams just for comparison. Any help is sooo appreciated!!!