Yes, it is possible and most likely the egg was not fertile. Not sure if the egg wasn't fertile due to this being their first round, though.I have a mated pair that laid their first eggs. 1 of the eggs hatched 3 days ago, but the other one has not hatched yet. I wasn't home when the eggs were laid so I don't know how far apart they came. Is it possible that the egg was never fertile in the first place or some other issue related to being the parents first round ever? Also if the other egg does hatch, will it survive with the competition for food from the now much larger sibling? Thanks
When there is a 3 day difference in age, you do need to keep your eye out on the younger one. I usually remove the older baby each time they feed the babies, and then return the older baby to be fed. Do this until the baby has grown and strong enough to compete with the older baby. You can avoid this issue by removing the first egg when it is layed and return it to the hen when the second is laid, and then incubation will be the same time. Usually the older more experienced hens will lay near the first egg, but not incubate it until the second one is layed.