My Cayuga Ducks will be 15 weeks old on Monday and I read that when they are between 16-20 weeks old they begin to lay eggs. Here come the questions. 1.Is that true? 2. Do I need to prepare a nesting box for them or will they build their own nests (I have straw)? 3. Is it okay for the hen to sit on the eggs (I notice a lot of people incubate, but I want the hen to do it natural)? 4. Should I separate the drakes and hens once the eggs are laid? 5. How long before the eggs will hatch? 6. I have three hens and two drakes, id this ratio okay? 7. Lastly, if anyone has any advice or stories they can offer about CAYUGA(and only Cayuga) ducks laying eggs and hatching I would appreciate it.