yolk sac attached at three days, now covered in dry poo and getting very large

[llcardinale]

Hello Everyone,
This little one is now eight days old and her yolk sac attachment is still attached (I thought it would have fallen off by now), but now is covered in a lot of poo and becoming large. Her vent is not blocked, which I know for sure because I can see her pooing, and also can see that it lands on the mound below it. I soaked her lower half in warm water for several minutes and almost nothing came off. If I touch it she becomes very upset, which she didn't do when I first got her and had touched it. It seems that it has become painful if touched. Has anyone had this experience?

 

[Chicken_Obsesser]

@gimmie birdies @Slothinc @Wyorp Rock

 

[Slothinc]

Do you have any pictures so we can see how large it is? Was there a lot of unabsorbed yolk?