Few of them seem significantly smaller by now, so I'm starting to suspect some "switch before birth"... But they all seem healthy and get along so I don't mind.
Yes, they are supposed to be, but I bought them as eggs from a random guy at the train station so if they turn out as something else I will not be shocked.
One of my momma hens hatched them here at home, but unfortunately she got into a fight with something... maybe a rat? And she passed away...