Blood spots or meat spots (called both) are nothing to worry about. They are perfectly normal and harmless. You don't see them in commercial eggs because they use a high powered light to detect them and then send the eggs that have them to the makers of baked goods, donuts, poptarts, etc. It will not hurt anything for you to use the eggs and you will not be able to taste or feel them in your meal. If you want, you can take the spots out with a fork or the tip of a knife but it is not necessary. The spots occur during the production of the egg inside the hen's body and are 100% natural. You see them more often in young hens than older ones and all hens have them from time to time. It's part of having farm raised eggs. Just eat and enjoy!