Being a newbie, of course I have a lot of questions. My main concern is my Black Sex Link Hen should begin laying any time now. I think she is about 20-21 weeks old. (give or take) What should I expect? 1. Will she show any signs of preparing to lay? (She has already blossomed red around her face: Comb, lobes, etc.) 2. Does she need to sit on the eggs for the 21 days until hatch? 3. Should I get an incubator or let hen do the work? 4. Do I need to be concerned with the Dorking roosters around? 5. Any other much needed advice is greatly appreciated!