I have a Farm Innovations model 4250 incubator. This is my first time hatching chicks out of an incubator. I took out the turner last night, and laid all the eggs on the bottom of the incubator. Within hours, 2 were pipping out. One hatched during the night. Four more have hatched today which is the 19th day. Is this normal? Everything I read said to take them off the turners on day 18 and raise the humidity to around 65% so they will not be too dry when they are hatching. I barely had enough time to get the humidity raised before they started.