One of my younger hens who has recently started laying has produced her first jelly egg and also a stray yolk, while she laid perfectly fine eggs before. I thought the yolk was poop at first (so did my dad as he stepped in it) and was freaked out by Peep-Peep, our cockerel of the same age as the hen, drinking it as something would have been VERY wrong with the one who pooped that, until I realized what it was after cleaning it up and finding the shelless egg next to the nestbox... 
I know it happens with new layers at times, even though they have free access to oyster shell grit, but if it had processed properly in the hen, we would have had a double yolker.
To make up for cleaning up the yolk they were drinking by the door, I plopped the yolk out of the shelless egg into a tray for them to enjoy, and it was gone within a minute.
I also mixed in some crushed up eggshells from breakfast into the oyster shell grit, just to be safe in regards to the calcium levels.

I know it happens with new layers at times, even though they have free access to oyster shell grit, but if it had processed properly in the hen, we would have had a double yolker.

I also mixed in some crushed up eggshells from breakfast into the oyster shell grit, just to be safe in regards to the calcium levels.