Hi, I have a gen that will be a first time mom if this works. She's been broody for Just over 3 weeks and we let her sit a bunch of eggs. I just put some 2-3 day chicks under her. She let me put them under her no problem, the last one she pecked at a little bit then settled in. How quickly would I know if she's going to reject them? I don't want to interfere and mess it up. But I don't want to wake up to all dead babies either.