I have 3 black sex links that started laying in October and laid and egg every other day for 5 weeks and then stopped. We add vitamin to the water and added another source of water, treated for mites, and still no eggs after another 5 weeks. They seem healthy. They love to free range at the end of the day. I don't think there are any stress factors for them. I also don't think it is the weather. I live in warm weather in the south. What could be wrong? I just want to make sure they are healthy because lots of posts say that black sex links will lay all year.