The other morning I opened the coop door and found a smashed egg. One of my hens was studying it but the yolk and the membrane were still intact. It looked like someone had pushed it out of the nest and it got trampled. This morning I was cleaning out the coop sifting through the pine shavings and I noticed that the shavings had like a yellow mucus on them. Then I found a tiny piece of egg shell. None of the girls have any evidence of yolk or anything on their faces... although one of my hens beaks looked a little sticky but no color on it or on her feathers? What should I do?