I have a female duck who for the last few weeks has been laying soft shelled eggs. She is about three this year, and this is my second year dealing with soft eggs. The first few months of the laying season she lays hard shell and then it changes midseason. Yesterday she laid an actual yolk and then the soft shell AFTER. I have tried oyster shell, in both food and free range and she does eat it but it doesn't seem to do much, tried kale to the same effect. I've mentioned before I'm not concerned about egg production, she is a pet but I'm concerned about infections. I did find this thread and was curious if it could be an infection causing this? She laid soft shells the end of last season as well but started this season out well. http://forum.backyardpoultry.com/viewtopic.php?f=5&t=8010316 I live nowhere near a vet so unfortunately that isn't an option. Is there a medication I could get online or at a farm store like Tractor Supply. Could my drake be to blame? I'm up for any suggestions I'm at a loss! She is perky, eating well and pruning as she should be. I'm only asking because I'm concerned it could become a problem. Thanks. dmlr.