Starting Monday night I had eggs start to pip. It's now Wednesday and I have six chicks in the brooder. They all hatched Tuesday. One chick hatched today and is still in the incubator. There are a few eggs in there that haven't done any piping. There is one egg that I just noticed had pip and started to zip but hasn't done much since. It's day 22. But, the problem is the incubator smells awful. As soon as I walk into the room I can smell it. Is this just the normal smell of chicks hatching? If it's a rotten egg should I get my chick out of the incubator and into the brooder?