All 4 of the girls appear to be happy and healthy, but...I have been getting 4 eggs every day for most of the winter. Once in a while, (maybe once per week or two) one of the eggs would have a small smudge of what appeared to be blood. Just one, never two or more. Now today, one of the eggs has more than a small smudge. The smear looked to be approx. 1" X 1 1/2". Is this a cause for serious concern or somewhat a normality. Would hate for it to be something preventable, caused by me or my management. Thanks in advance for any input on this.