My mom's chickens have only been laying about a week. Her roosters are always on top of them. My chicken just went broody. I want to take some of my moms fertilized eggs and place them under my broody hen. My mom doesn't think that her newly laying chickens have big enough eggs to hatch yet. Neither of us can find much info online. All I can find is that if they are laying then they are sexually mature. Anyone know if there is a "waiting period" so to speak? Should the chickens have already been laying weeks, months, etc before trying to hatch those? I don't want to miss the broody period, but if it's too early I'll just break her broodiness. Thanks!