You don't have to remove the chick it can live for up to 3 days in the incubator, I worried about them rolling the eggs around too but it didn't seem to hurt anything I had a decent hatch. If you do remove the chick make sure it is either dry or you have a good draft free brooder set up for it to dry under the light and if you open the incubator have a spray bottle on hand and mist the remaining eggs and walls of the incubator with warm water, and open/close as fast as possible