yes, eggs have a natural "bloom" (coating) designed to protect and keep them fresher longer. I did this research a while ago, and am trying to find those articles again. If/when I do, I'll post them. It's good information to have. Better not to refrigerate or wash unless certain...
A couple of my chickens have started doing this too. One is the Queen, from the first (year's) batch. There are a couple from the third (year's) batch which have followed suit. It's like they have decided to "camp out" in that it's warm now outside, the roost outside (which isn't really a...