So I have three 24 week old Buff Orpingtons, four 22 week old Easter Eggers, and a bunch of other hens that are all over 16 weeks and still no eggs. They have extra lighting and heat. I also give them 24/7 food, water, and oyster shell. They are all very healthy and active but still nothing. They have nesting boxes and I even put fake eggs in there for them. Any extra advice I might be missing?