I have several eggs that are about 7 days along and they are spotted like this one is but show no sign of any growth. However, I have 2 that are at day 9 that appear to be progressing just as they should be. I have seen the spider like vessels in both ....etc but they have spots similar to the picture but are not quiet as bad. Is it some disease to be concerned with or just thin shells?? I'm sure it's in another thread somewhere but I have had no luck finding it. Thanks in advance