Help with broody hen, hatching eggs, and day old chicks

Okay I have a few questions hopefully someone on here can help with. I have 6 eggs that are due to hatch tomorrow. I also recieved (6) day old chicks today. Im going to try and slip the 6 chicks under her for her to raise as well. Should I wait for the eggs to hatch first and then slip the fosters under her? Or should I go ahead and slip the chicks under her and wait for the eggs to hatch? Im guessing the first choice is best, but Im not sure. Also Im sorta nervous about the hatching eggs. See the last eggs didnt do so well. Granted they were Araucanas, and they have bad hatch rates, but still I keep telling myself maybe there was something else I could have done to help. Should I hear anything coming from the eggs yet? Should I see them moving when I candle them?


Im going crazy!!

 

I thought it would be best to wait for the eggs, but like I said, I just wanted to make sure. Okay, on the eggs..should I hear anything or see them move some when I candle them?