My bantam Cochin layed eggs the whole time she was raising chicks, and occasionally while she was setting. I think it is because she was broody because she really wanted babies, and not because of a hormone. She would also occasionally crap in the nest on accident - another reason why I thought she might have been broody out of sheer will. She was also pretty aware instead of in a trance, unlike my Black Australorp who is clearly broody out of a strong instinct. Isolde, the Cochin, is broody again, and I am noticing the same things as last time.