We were typing at the same time. Thank you! I have done that to both of them. The other one has just a little left to absorb too I think. They are fighters though so that is good. they are chirping up a storm in there. So I am hopeful.Take a deep breath. First of all the darker one on the left looks perfectly normal. That will slowly dry and detach. The other still has yolk to absorb. Wrap its bottom in a clean cloth/paper towel place it upright in one of those egg holders. You need to get it in a position to where it cannot move or get out of the holder. It will close up the area around the un absorbed sac. You might have to keep it separated from the others till it is completely closed and healed as they will try and peck at it. All is not lost. I have seen babies with yolk sacs bigger, and survived and were fine. The one on the right, since it wont get all the yolk will need to eat and drink sooner than the others.