This thread has been so helpful! My Cayuga just started laying and all three of her first eggs were jelly eggs. My Indian Runner started laying first, and she has absolutely no problems with her eggs. I have been feeding them extra spinach everyday because I feel bad that they can't free range like the chickens (they go and poop in the pool). Well, DUH! I forgot about the oxalates in spinach. I will have to vary their treats from now on and give them oyster shells on tap as well. Cheers!