My current batch of eggs hatching in my incubator are coming along great. However, one of the chicks that hatched yesterday has a huge swollen eye. I have separated her from all of the other hatchlings, and even tried cleaning the eye with running water in case it was caused by something getting in it. This morning it is still the same. Has anyone encountered this or know what it is? Is it sign of disease or just a birth defect? Nothing infected looking about it, just seems to be a huge eye.