I have 2 eggs under a broody. Today is day 7. I candled them tonight and egg #1 is spot on with pics of day 7 that I have seen. My question is regarding egg #2. It has veins and an air pocket, but there is a black mass that takes up about a 1/4 or so of the egg. What does this mean? I would take a pic of it, but I'm not sure if my cam can take pics in the dark. I will try and see what happens. Here is the article from BYC that I am going by. It is a very good article, lots of pics.
https://www.backyardchickens.com/a/candling-pics-progression-through-incubation-of-chicken-eggs
https://www.backyardchickens.com/a/candling-pics-progression-through-incubation-of-chicken-eggs
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