OK, I quit reading somewhere on page 7, but will comment anyway. (I usually try to at least get through the thread first, to make sure I'm not just repeating someone else's information, but I couldn't stand the bickering any longer.) OP, I have no doubt that your NHR went broody and raised chicks. Any hen can go broody. It's just that there are some breeds that are more prone to it, and some that are less prone to do so, so not all hens will. I don't believe you can force or influence a hen to go broody. It happens in their own time, when the conditions are right. If you're in the US and in the middle of winter, chances are slim a hen will go broody whether you could influence it or not. The longer daylight hours in the spring will help that to happen, just like it gets them laying eggs again. If you want chicks on your schedule, your best bet is to get an incubator and use that. Otherwise, wait it out and if your girl goes broody again, give her some eggs.