Also, in my experience, i found that you must remember that they are all individual. What works for one may not work for another.
If you'r worried she could be ill, trying a spa treatment (epsom salts bath and blow dry and some general TLC) can do wonders. If she's got a problem egg or stool...
Impossible to say. Could just be winter if you arent providing extra light. If they don't have heat, light, and lots of great food and calcium through the winter they will completely stop laying until the days get longer
Be sure you are feeding them a high quality layer feed and providing lots of fresh water at all times and a calcium supplement like crushed limestone or oyster shell. If you dont want to buy it, save the shells from their eggs, crush them, and feed them back to them. I mix oyster shell into...