Oh, dear. I cracked the wrinkled egg my pullet laid this morning, and while some of the white was normal, I'd say half of the yolk WAS watery. The pullet is taking a dustbath at present and seems okay, but if it is IBV, are there any other symptoms.
Here's a link. Scroll down to Infectious Bronchitis.
http://edis.ifas.ufl.edu/ps044