My hens are 16 months old and one hen sets all day long but goes up and roosts in the rafters at night. Will the eggs still hatch? I live in Georgia and it has been close to 100 degrees during the day and in the mid 80's-high 80's at night. If a hen sets all day long day long does she know if the eggs are alive or is she just doing this based on instinct? Thanks for any info. this is my first full summer with my chickens being full grown, still learning the ropes. They are Rhode Island Reds.