I wouldn't be too worried. Since I got worried recently that Snow White was egg bound and I started reading a lot on egg binding, it seems that you should really be concerned if they are lying down a lot or can't stand and they just keep moving their tail up and down. Then that is when you need to help. So far what your hen looks like seems normal but just keep an eye on her behavior and if she is eating like normal.
The other day Ice looked a little egg bound. She was supposed to lay an egg the day before but hadn't. I was watching her then I went off to get their food and feed them and the next time I looked she had an egg under her. I then realized it was an abnormal egg. It had no shell just a thin casing. I need to find and copy that chart that Kathy posted recently showing different egg abnormalities and the causes of them.
I think I have noticed a connection with the grass in the pen dying and the egg production going down. I tried re-seeding with a summer grass but that grass did not take at all, so hopefully soon I will be trying a new kind of summer grass. Sid of Texaspeafowl did tell me that I would see an improvement in breeding results if I got grass in the pen. Now I am going to try planting millet in there I think.