Building behavior can last for months. I would keep all as normal. Of she lays she'll lay infertile. Sometimes they reabsorbe follicles. What building means is her follicles are building up Getting ready for Ovulation. Once ov approaches, the follicles the "eggs" move into the oviduct and become eggs. If you have her out sometime stretch her out and run your fingers down her body on her stomach. You have to press a bit. Look up palapatation, you'll be able to feel what feels like a string of pearls. That way you can confirm for yourself she's building. But that's pretty classic behavior. The girls usually eat ravenously during this time.
Ps Good for you about waiting to do more research! I wish more people would do that.
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