Last night, I noticed a yolk on the coop floor. It barely had a shell at all, just a floppy layer that looked like it was supposed to be a shell. All my other eggs have been solid, so this was a surprise. I have 5 pullets and I know at least 4 of them have been laying. They're about 20 weeks old. I get 2-3 eggs per day at this point. I've been giving them layer feed and they don't free range. I do give them veggie scraps to snack on though. Is it normal to get a soft/no shell egg randomly? Or for new layers? I put some oyster shells out today in a separate bowl to see if they need more calcium.