I acquired 3 POLs in September and they were laying fine for two months, they all of a sudden, one stopped altogether, one carried on and the other has started laying soft/membrane eggs (See photo).
I haven't changed anything to do with their environment, they have layers pellets freely available, a handful of corn every other day, some kitchen scraps e.g. bread soaked in water and stale biscuits. They are completely free range but also have a handful of oyster grit every other day. I know it is common for one or two when they first start laying, but this has gone on for a month and a half now! I have tried adding vitamin supplements to their water and their feed, but nothing has helped, I am at a loss as what to try next ... any ideas?