and Welcome To BYC! It isn't unusual for a hen to get her eggs a little dirty or have some poop on them, it doesn't seem to make any real difference in their hatching ... though If they are really filthy / covered in poop (especially if an egg has broken) I usually take them out just to keep the nest other eggs cleaner and not worry so much about contamination from bacteria etc. Has your hen ever gone broody? What breed is she? Just because a hen is laying a clutch doesn't mean she will necessarily go broody any time soon. You may want to mark the eggs by date so if she keeps laying you can take out the old ones ... or put some fake eggs in the nest and collect the real ones and store them until you have as many as you want her to set on (12?) and just replace the oldest eggs with the newest ones until she goes broody, then give her back the collected ones. The BYC Learning Center has some good articles on Broodys you might like. ie https://www.backyardchickens.com/a/broody-hens
