Every hatch I've did I always have chicks hatch on day 20. Why is this? Is my temp to high? Ive got three different bators and my I keep my temp at 99 on one thermometer and 100 on the other one. I thought it might be my hovabator thats still air so I bought a brand new hovabator with a fan last year. And I had lav opr eggs on and splash marans. They are due tomorrow and I already have 6-7 chicks. Does it hurt for them to be early? My others are really healthy birds.