One of my flocks has two d'Uccle mix sisters who will be two years old this coming May. They are nearly identical and have always laid identical eggs. They each lay almost every day and I have no way of knowing who laid what egg unless I happen to see them laying, and I've only ever seen that once. I've never had problems with either of them until this laying season. Occasionally I'd find the tiniest speck of blood on any of my hens' eggs, which I know is normal. The problems started about three weeks to a month ago, with one of the d'Uccle mixes. Early to mid-February, I got an egg out of that pen that was covered in blood on one side. I assumed maybe her vent had to re-adjust to laying after being off for the winter, so I didn't think much of it. It's still been happening, with increasing frequency. After the first bloody egg, it was about ten or so days before I found the next one. Then I got another bloody egg about five days after that. Now I'm getting a bloody egg every two or three days, and the amount of blood is increasing. I guess it's possible that both d'Uccle mix hens are doing it, but when I get two eggs a day between the two of them, only one is bloody. The bloody eggs are very, very slightly larger than the non-bloody ones. I don't know if it's connected, but one of these hens has become a little skinnier than the other, even though they always have food available. I'm including pictures of the eggs I found today, which were laid over yesterday and today. I'm concerned that the amount of blood and the frequency are both increasing. ^ the four eggs from today and yesterday ^the bloody eggs; the one on the right is the worst one yet ^the other sides of the bloody eggs; all the bloody eggs I've gotten so far are always clean on one side Can anyone tell what the problem may be?