One of my hens just laid 4 eggs over the last few days. Today no egg but when cleaning the run some I found what looked like an egg white. No yolk. Should I be concerned?
Are you talking about a soft rubbery egg or an actual blob of egg white. Most will lay an occasional soft shell or small egg with no yolk, this is normal.
I guess I wouldn't worry unless you see something more, though I don't think there's anything you can do about, are you sure she didn't drop the egg in the run and proceed to eat it, that's possible as well.