My finch hen laid 4 eggs and started sitting on Thursday. When I went to change the paper at the bottom of the cage on Saturday I noticed one egg that was cracked and dried so prob been there overnight. Then late Saturday night they threw 2 more out although there was yolk in the nest so it probably broke in there first. One of these eggs had some development in it. The final one they left in the nest but abandoned it Sunday morning I removed it in the evening as it had been left too long and this one had development in it. I have never seen or touched finch eggs before and they were very fragile so I don't know if they accidentally broke them and then threw them out. Any ideas why this may have happened and when can I expect them to try again?