Hi everyone. My daughters and I decided to buy an incubator and raise some chickens. We apparently have done a great job up to this point. When we woke up yesterday we had our first little feather baby by bed time we had 3 more. This morning we had 1 more and 2 on the way. We are a little concerned because the incubator is getting crowed with the chicks and egg shells. I have read on here that they can stay up to 48 hours in the incubator but a lot of posts have mentioned that you need to open vents. We don't have any vents except one small hole at the top. Should I just leave them alone. Or get the older ones out after the 2 have come out completely? Thanks in advance!!