I have 5 Leghorn hens, each of which has been laying one egg a day for the last several weeks. Over the last two days, it's dropped to 4 eggs a day. I honestly can't say that they are all laying, but are all about 25 weeks old. I've been assuming each one has been laying one egg a day. Anyway, I would like to know if I need to be concerned, these hens don't let me near them like my other breeds do, so it's hard to really get a good look at them. Is there a possibility that one is egg bound, or maybe something else? Do I need to be concerned, and what should I watch for?