My 9 month old Black Sex Link hen has suddenly been missing days egg laying. What could be the issue? We haven't changed up feed or snacks (oats & mealworms), but we did recently build a chicken run onto the coop that houses 2 other chickens besides herself..that is the only change. All 3 chickens get along well and are let out to free range during the day. They only are closed inside the run at night and also when we are doing yard work during the day (which is once a week for a an hour. There is plenty of room, water, and chicken feed inside the run and they can also go insidr the coop. There is also plenty of shade and a fan tunning throughout the day. It has been hot here for months and still is, but she has been laying an egg wvery day since June until now, She suddenly has missed 3 days within the week. What could be the issue? We could really use some help or insight, as we are still pretty new to raising chickens. She is our oldest hen - the other 2 are 4 month old GLW's. We appreciate your advice..thank you!