I took pity on my super broody silkies and got them some fertile eggs to hatch frm another farm. The lady at the farm thought the eggs were around a week old. In the last two days I found three of the eggs broken and drained, they smelled bad. They had some blood in them, so were beginning to develop but seem to have turned bad. Would the silkies themselves sense this and have pecked the eggs open? They obviously hadn't burst, just had a hole in one end. I have four eggs left, so fingers crossed these ones will survive.