I, personally, have crossed bantam birds with standard birds and had no problems. Although, it was always a bantam male over a standard female. I was afraid that the standard male would either kill the hen by trying to mate with her, or the chick would be to big in the bantam sized egg to grow properly. I am actually going to be doing this later int he year with Cochins, im crossing a bantam Frizzle Cochin over a smooth Standad Hen to get SQ Standard Cochin Frizzles.
~Casey
~Casey