Found this egg in the coop today. It wasn't cracked open, but when I did this was in it and there wasn't a yolk in it. We have been having a lot of squishy eggs at the moment and also very bumpy ones. Also out of 6 hens were only getting around 2 eggs a day! They do have an infestation of lice, but I am treating the at the moment with powder. One of our hens has a massive red swallen bum and has had it for over half a year. I think she may be laying the squashy eggs? Could the lice be causing this? Here are some pics: