i bought some eggs and stated up my hova-bator ready but couldnt get steady temp so i thought about my cochin bantam so i went and grabbed her put her in a broody pen and gave her some golf ball unti the eggs get here and she got right to busines and started to make a nest and all that other stuff.is it weird that she will sit any time i let her. i made the broody pen how big does it have to be