I have a broody hen that keep sitting on the wrong eggs... What do I do?

[Roberts2100]

I have one hen that wants to be a mom but I have 4 nesting boxes right next to each other. I don't know when she is going out to eat/drink. But when she does she goes from box 2 to box 3 or sometimes box 1. How do I keep her going to the correct box? Should I make a small cage just for her? I have a dog crate I could put her in. When would I need to move her? Please help I want some natural baby chicks.



Thank,
James