We have a leghorn hen who is usually very productive. Over the past couple of days, we have not seen an egg from her. She has had more free time in the yard but I can't find the eggs any where out there, and they are not in the nesting box. We have not changed her diet, and she has plenty of water. She is running around like normal. And does not seem like she is ill in any way We live in Phoenix and it is getting to be around 105 during the day here. I have read that heat can slow them down some. I looked at her "exit" and it does not look blocked or anything. But then again I really don't know what I am looking for. Any suggestions?