HI! Due to limited space our pair of call ducks are living with our chickens. I opened the coop this morning to find an egg on the floor. BUT I have a white egg layer that tends to lay her eggs on the floor sometimes. But this egg is different it's shell is smooth and kind of grey-ish tint to it. But it also seems to have a thinner shell so I am not sure if this is a thin-shell chicken egg or a call duck egg... It is about the same size as my medium layer chickens. About the same as my Lakenvelder hen lays. HELP PLEASE! I am really hoping this was her first egg so we can get some together to hatch! I am thinking I may need to move my lakenvelder to be sure of whats going on. I don't have a specific place for the ducks just yet but they will have a new place soon! Any advice or photos would be great!! I am so new to the duck thing!