i have a roo that is the product of a bantam Faverolles roo over a LF Cuckoo Marans hen! so it is possible to have it happen! i think my hens prefer a smaller roo instead of the 'big bully' roo that could hurt them!
you can have many outcomes with the size of the grown chicks from this type of crossing. you could have small bantams, normal sized bantams, in-between size of bantam and LF, standard sized LF, and nearly giant LF! i also had a cochin (bantam) x EE (LF) that when he was 7 months old was at 10 lbs!
i would suggest about 6 large hens for a bantam roo. it also depends on how 'busy' your roo may be with everyone in the flock. sometimes a roo favors one or two hens over a large group. you could always do artificial insemination if you want to be sure that the eggs from the crossing are going to be fertile.
and, btw, the only 'dumb' question is the one not asked! this is a place of learning so go ahead and ask those questions!!!!
