I hope someone can help us. We have 4 hens of unknown ages and 3 varieties. About 2 months ago they started molting and quit laying eggs. All of them started molting at staggered times within a week of each other, then once they were done, they started molting again. During this time none of them were laying eggs and now that the molts seem to be over- still no eggs. In addition to this, today they came out of the coop with white crusty stuff on their beaks near their nasal cavities. I hate to put them down but we have new pullets coming soon and I don't know what is going on. Any advice is really appreciated.