In eggs produced at home instead of purchased from Piggly Wiggly your going to find a few blood spots from time to time. In a commercial operation every egg is candled to the best of the abilities of both humans and machines, eggs with blood spots inside them are rejected. Therefore you never see a commercial egg with a blood spot because they don't make it to the store. (well almost never) In a commercial operation any blood streaks on the outside of the egg shell is quickly washed away while the shell is being disenfected.
Try this with home grown eggs. Break each egg into its own cup or saucer before individually adding the eggs to the dish your cooking one at a time. Keep a tea spoon handy to dip out any small blood spot. As long as your planning on cooking your cackle berries then there's no problem.
If something is frighting your hen that can sometimes lead to blood spots. There's other causes. It should clear up by its self. You can also beg, borrow, or steal an egg candler and learn how to candle your own eggs. If it does't clear up on its own let us know.
