It is called a "blood egg" when commercial egg candlers see a blood egg it is considered a cull. You simply throw it away. There is nothing wrong with your hens.
I have several different breeds of chickens but my Silver Penciled Rocks, both the roos and the hens, are picking their feathers out!! I did what one of my chicken books suggested and mixed vinegar and water and rubbed it on them....BUT, they seemed to like it. It made them pick even more...
My husband, of 37 years, and I live on 4 acres in California's Cowboy Capitol. We have two adult children, both have their Masters in Education and teach at local schools. As a young girl, my Dad raised Game Chickens. So, chickens aren't totally foreign to me, but it has been many years since...