did you check the eggs? Did you dispose of the eggs? Depends on what day you started counting from along with environmental conditions. I don't start counting until I know she has quit laying and decided to start holding tight and only leaving the nest once a day. Even at that, I just let nature run it's course. If it really is a failed hatch then you can keep removing her from the nest or section off a part of the pen so she cannot get back to the nest that she was on. Usually takes about 4 or 5 days for her to get back to normal.