I hatched four keets today. One has the yolk sac outside, hanging off his belly. It's the size of a large pea and is yellow, with some blood vessels visible in the membrane. The keet is laying on its side and active and peeping. It's been about seven hours since he hatched. The other three keets are fine.
What causes this? Will it live? And should I do anything?
What causes this? Will it live? And should I do anything?