How do you cure a broody laying hen?

Answers:
Basically, you need to cool her down. To do this, you need to put her on wooden slats (and don't give her an option to get onto a solid floor). These wooden slats should be a few inches off the ground to ensure good air circulation, cooling her down. Make sure that she can't be rained on, and that she has shade. An open umbrella over the cage is a good option for this.

Make sure you provide her with food and water during this time, and beware that breaking up a broody normally takes about three days.

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It's difficult but it can be done. First of all, remove all eggs from her presence periodically throughout the day (this if you have more than one hen). Don't provide a private nest box, make sure it isn't dark. Some people isolate the broody hen. Just make sure she can't get to any eggs. When she tries to peck you for interrupting her "space" throw her out of that space. The hardest way to stop it - put a fake egg in her nest. Let her sit on it until kingdom comes and she realizes it isn't going to hatch. Just make sure you keep removing all the other eggs she lays. She will eventually give up. It make take a month though! Good luck.