Yesterday when my wife collected the eggs from the coop, the one egg from our best layer was covered with white pasty stuff. I thought it was from our rooster since he likes to try to mate with the hens while they are laying, but I want to make sure so I turned to BYC for help. What could it be and should I be worried. Her vent is clean and normal looking when I checked it and she is eating and drinking fine. She is also pooping normal also and acting normal. What is it? I appreciate all help on the matter.