I have a mottled cochin bantam and she is now 8 months old and she is still not laying. I have another speckled sussex and light Brahma and they are laying great. But my bantam will not. I also have another bantam rooster that is the same age and he bothers her non stop. Could the rooster be the problem? Its my first time having a rooster in my flock so I don't know much about them.