Until a week or so ago I had been keeping my ducks out in their run until 8:30-9 with low-light Christmas lights outside. Then I started putting them to bed and turning off all lights by 6:30, as I didn't realize that keeping them up later than daylight might be harmful for their reproductive system. I'm sure the timing has to be a coincidence, but ever since I made the change my 20 month old pekin has laid three softshell eggs with this weird thing at the end, and laid them mid-day, which is unusual, though it's happened on occasion before with one duck or another. She also laid a cracked egg - not sure if that was soft-shelled, and a tiny egg, pictured below. I'm concerned about what's going on with her. She has constant access to oyster shells, and I just ordered Grublies for extra calcium, and have offered those a couple days - they don't really take to them yet. How worried should I be about this? Any suggestions?