I have 6 layers, they are 8 months old and a few weeks ago, we were getting 4-6 eggs a day. Now I'm getting 1-3. What's the deal? My guesses (please agrue for or against them): Shorter days-but they aren't that much shorter?? I added some 2-3 mo old chicks to the flock about a month and a half ago-two are roos?? They aren't molting, I haven't changed their food. What could it be?