When she stops laying eggs and she has been sitting for about two weeks is the time to put fertile eggs under her.Yes, I'm fine with her going broody I put 5 eggs in front if her waited 20 minutes then went out and they were all tucked under her.
I have fertile eggs stored from a few hens I would like to hatch. But I'm not sure she will go through with it. This is by far the longest she has stayed with out moving. However she laid yesterday. After her last egg is when she's full broody if she sits? I'm really not sure what to do cause my other broody is top hen I'm hoping she doesn't bother Oreo .
You might need to move her if there will be broody competition though. Wait two full weeks to try moving her. Sometimes they become very fixated on that one nest and moving them will break them from being broody.