My husband and I have two, a gray male we call Red and a pearl hen we call Lemmie. Lemmie laid one egg on March 18th, another the following day, and two more a day or so later. The first chick hatched on the 21st day (April 8th) the next chick hatched the following day. Four days have passed and the other two haven’t hatched. My question is, “How long should we wait before removing them?