Here's our very odd situation... Roughly two months ago, we bought two new week old chicks. At the same time we changed the brand of layers pellets for both our year old hens. Within the last months our two hens have stopped laying. They occasionally produce full size yolks with very soft shells or lay very small deformed eggs in strange locations around the garden (picture attached) One of the chicks also got very sick (trouble moving & breathing) and had to be put to sleep by the vet. The other is also very sneezy & wheezy but seems generally fine in herself. We've been giving the three remaining chickens apple cider vinegar and this week a course of colodial silver. Does anyone have any suggestions about what might be happening? Could the laying and sick chicks be related? Any help or advice would be VERY much appreciated as it's causing us quite concern.