I currently have 47 chicks from ages 12 weeks to 3 weeks...we have 29 LF (Large Fowl) chickens out of those 29 5 are straight run and out of those five straight run right now (they are only 3 weeks old) we see 2 roosters...and we have 18 bantams out of those 18, 2 are roosters and 4 are 3 week old straight run silkies. Right now the 3 week old's are in brooder boxes and in 2 weeks they will be in a grow out pen until they are big enough to go with the 12 week old's and when they are big enough all of the chickens will be in one coop and run...we are planing on getting a LF Barred Rock Rooster in a couple of weeks and we would put him with the 3 week old's because he is around the same age as them...finally I can get to my question LOL....When they get the reproducing age would the LF Barred Rock Rooster hurt my bantam hens? We have plenty of LF hens for him..so I am hoping that we would just kind of ignore the bantam hens of course we would not hatch the eggs if he did take a liking to the bantam hens, but would he hurt them because he is so heavy I think Barred rock rooster mature to around 9 1/2 lbs. and bantams are 2 lbs or less. Do you have a mixed flock like mine...have you have ever had any problems with LF roos and bantam hens together? Any opinions are appreciated.