She passed a soft-shelled egg this morning, and she's acting like her normal self now. She has been laying for about a year.
This was our first egg-bound chicken, but my husband and I googled and found a thread on backyard chickens about egg bound chickens. We put our hen in a warm bath with epson salt, and lavender. She soaked for 45 minutes, and enjoyed it immensely. Then while I was running to the store to get some calcium (30 minutes away), my husband was home holding her and massaging her abdomen in a dark room. I came home with calcium, rubber gloves, vaseline, and preperation h. We couldn't feel her egg in her vent, it was still in her abdomen. We put preperation h in her vent, and syringed her some calcium then left her in our bathroom on a towel over night, in the dark. When we woke up, she had passed the egg. :)