My dad is trying to hatch some eggs in our still-air incubator. We start them in a forced air with a Turner, and then place them in the still air a few days before they are due to hatch. Most of our chicks never made it to pipping this time. However, we have a chick alive that has not yet pipped, and we need to know how long we should wait before assisting to give him/her air. Thanks!