naaa i have 2 rooster and 3 hen together and he jump at the other one and pecks sometime but the roost beside each other an the only time he pecks the hen is 2 mate
u might need more hen i know somebody that has 54 hen and 9 rooster in a 12 by 15 space
my 2 hen did the same she even layed egg under there insted of with the other eggs and the thirded hen got killed by something. so ur chicken saw something and got chased and she was scared bad enought 2 not come out, so let the other chickens out and she will hear them and should come out