I just went out to let my girls out of the coop, and I noticed when I went to collect eggs (one sad, pathetic egg so far), I noticed the egg shell had blood on it. Not a lot, but enough that I noticed it as soon as I opened the door to the nesting boxes. Should I be concerned? The girls seem happy and healthy enough, I haven't inspected them closely today because I had already let them out when I went to get the eggs, but I did just lose my alpha hen last week, so I'm a little more on edge than I normally am. Does this happen sometimes, or should I be worried? The eggs I collected all this past week were fine. I should probably note, we do not have a rooster, so our eggs are all unfertilized.
Here's some info off of this site. I wouldn't worry so much yet, just keep a watch on it. https://www.backyardchickens.com/a/common-egg-quality-problems
It's one of those things that just happens sometimes. I've had blood splattered over half the nest box and never been able to find who it was. It shouldn't happen regularly, but from time to time is not a big concern. If all your birds look happy and healthy, sounds like you're good.