I have 5 hens that are approx 5 months old. They are all laying. They have been laying normally for a few weeks now but a couple of weeks ago I noticed a really soft rubbery egg that was broken on the roost and laid in the middle of the night. Fast forward a few weeks, I have been getting normal eggs about 60% of the time but last night I found 4 of them rubber eggs broken and one whole. See pic. This looks to me like "Dropped Egg Syndrome" to me but I have read that it's not common in the USA. These hens were all raised since birth except for one which was given to me and is about 2wks younger. They are in a coop that is brand new so no chance of being infected by older hens etc. They are free ranged all day long. Fed Purina Layer feed, corn, sunflower seeds and crushed oyster shells. What could be going on here ? thoughts please ??? If this is dropped egg syndrome I have read that molting them out will fix it, but I live in Northern Maine and it's getting cold here. I do not want to do that to them, they will freeze to death. Thanks for any input.