I am not new to having chickens but am new to using an incubator. We have had chickens for years but usually bought chicks from a hatchery or let a broody hen run her course. I have twelve eggs I started in the incubator and just took the turner out yesterday. Today is day 19 and this afternoon our first chick hatched. I am worried about leaving the chick in the incubator until day 21 to allow the other chicks to hatch. I was also surprised to see that one hatched today, is this normal? Any helpful suggestions, hints, tips etc would be greatly appreciated.