I have noticed I have one speckled Sussex bantams hen who is 2 years old this year that lays large eggs with bubbles in them....sometimes these eggs will grow in the incubator but don't make it more than two weeks before death in egg. Is this an issue with her where I won't be able to save eggs from her ever that will hatch? All my other chickens lay normal eggs....or is there another reason they r not hatching possibly and these eggs should hatch? Candling the eggs as soon as she lays them or after a week in the incubator both show this grouping of bubbles....and it's every egg that is hers..also I did notice there is still an air pocket at the end of the egg as with all eggs.