My "neighbor" actually lives about four miles away. We are a very small farm community. We were not feeding the same feed. I am feeding Countrylane Layer Pellets (16%), a few table scraps or scratch, and oyster shell. Pellets and oyster shell are available 24 hours. I was fermenting the pellets. It looked and smelled good. It makes no sense to me. As soon as I quit FF, the eggs were fine again.