so...we alrady have hens that are about a year + 3 months and i want to know A. how to make them broody?....B. if they are broody will they adopt new born chicks from the store?.....C. if so can i bring a broody hen to sit on the chicks in their cage or do i still need a heat lamp?....D. if not when is a good time to introduce new born chicks to a flock of hens??? thanks..