She is still laying these eggs. Mostly she makes it to the nest box and then tramples them and they break, too thin, bumpy etc. She still looks great and I am willing to give her another month. Here is a message I got from Birdvet about the D3 (Wynette, please read):
Tums can be a problem because it will change the acidity of the GI tract causing the death of normal flora, disrupting digestion, and potentially leading to yeast and other infections. Even though it contains a high level of of calcium,Tums is not a good source of calcium. For calcium to be absorbed in the gut it needs to be in a 2.5:1 ratio with phosphorus and there is not enough phosphorus in tums to match this ratio. Additionally, calcium cannot be assimilated without vitamin D3, and there is no D3 in tums. Without these and some other nutrients that are also not in tums, nearly all of the calcium in a tums tablet is going to be passed out in the droppings. Finally, excessive calcium in the diet can cause mineralization of organs, particularly the kidneys.
If some else mentions tums, you are welcome to share my email with them. I may even post it on BYC.
This problem is still possibly a nutritional problem. It can also still be the other issues I mentioned in my post, ovarian cyct or tumor, egg yolk peritonitis, or other reproductive problem. You should find an avian veterinarian that can examine and x-ray your bird to get a diagnosis and provide appropriate treatment.
If she is eating mostly pellets and you are supplementing oyster shell, then you do not need to supplement with calcium. In fact if you do she can be over dosed and cause other problems. As for the Vitamin D, birds ned a different vitamin D, they need D3, which can not be supplemented in a pill form. If she is outside and is getting sunlight, she will make D3 on her own. Do not supplement with the calcitrate. This is going to cause harm not prevent it.
So there you have it. I am seriously considering adding a couple of chicks to the flock. My Sexlink isn't broody anymore, now I think that is a big bummer!! Lorelei will have to prove to me that she can do her job. Poor thing. I really love her.