Sounds like she's good and broody......Thanks for that! It's been around 4 days now and she's still sitting on her egg. There's only one but I haven't checked for the bullseye yet. She gets upto eat but that's about it..
.......if you want her to hatch some eggs out, remove the one egg she's been sitting on and get some fresh fertilized eggs and give them to her all at once.
Read up on broody hens:
Advances search>titles only>broody hens