Science Project (Need Help Please)

[N.WChickenkid]

Hi Everyone I am looking for some background research on my science fair project. So here is the question that i picked to do, hatching serama chicken eggs i am going to compare a older laying hen and a younger laying hen and see which one's chicks turn out healthier and i am looking for some background research

 

[The Breaker]

hhmmm I don't know but I'm shure some one on here can answer this