I have a flock of 8 chickens, and 2 are older than the rest. The 2 that are older are a leghorn and red, and have been laying an egg a day since mid August, so for about 4 months. The other 6 I raised as chicks and are about ~5.5 months old and 1 barred rock started laying 2 days ago.Hooray! However, the red that was laying daily has now stopped. I can tell because I've seen the barred rock on the box, and her starter eggs smaller and a lighter brown than the egg I was getting form the red. No second brown egg to be seen. Why would the red stop laying? There are enough laying boxes, and they are all getting the same amount of light and same kinds of foods, all have access to water, layer feed, etc. Would the amount of light affect one breed differently than the rest? The red hasn't shown any different behavior, still the same happy active bird. Would appreciate any thoughts!