I have 2 leghorns and they haven't laid in about a week now. I am worried. They are my best layers, giving me an egg almost every day. But they haven't laid an egg in about 5-6 days now so I'm worried. All the other chickens (and duck) are laying just fine, so I'm confused on what has made them stop laying. They don't seem to be sick or anything. They are acting normal and everything. Is it normal for them to stop at the same time??