I don't think collecting eggs has anything to do with it. If the broody hormone kicks in, she won't care whether she has eggs or not. Not only do they stop laying, they don't eat much and lose weight, can even starve. If there are no fertile eggs (or store bought chicks after she's set for a couple of weeks) she may just keep setting. I had one set for 3 months and lose quite a bit of weight doing it. Next time she went broody I let her set eggs and raise chicks; figured she'd be healthier and go back to laying sooner. Now I have roos again, glad to say, so next time I'll just let her set and raise chicks again. Her chicks are a month old, so I figure sometime next fall we'll be setting eggs again.