I am bummed. I have 14 eggs in the incubator. Today is day 7. I just candled all of them and only two have veins in them. Can you tell if they are infertile by candling? Some I can like see the yolk in them it seems, but no veins . I really hope that they take off... How long do I give them before I remove them? These were shipped eggs, and it's my first time hatching.. However, it's in the Brinsea Eco 20, and I've heard nothing but raves about it. I am trying to stay hopeful! Thank you!