I have one chick that has an unabsorbed yolk sac. It's been this way all day, no reduction in size. It's about the size of a small marble. Chick has been isolated in a 16 oz. cott cheese cup, paper towel lined and kept in incubator. She's chirping, and occasionally up on her feet. I did put betadine around it, but it's crusted with debris from her dragging it around. It's got a stem that is about 1/4" long. Should I cull her, or should I tie this sac off, and give it a while, and clip it? If she's going to be special needs, I'd rather cull, but she seems to be a bit spunky. Suggestions? Any one successfully dealt with this before?