I've heard that too but mine is outside right now happy as a lark and it is probably 40 out. Their coop isn't heated but is insulated. She is a larger Serama - probably "C" size so maybe that is the difference. She is nearly as big as my D'Uccles.
I have been keeping an eye on her as far as the cold goes, since I know they aren't supposed to handle it well.
I have been keeping an eye on her as far as the cold goes, since I know they aren't supposed to handle it well.