We have two brown eggers, one EE and the rest white, we also have guineas. They are all young and are just starting to lay. We have been getting two brown eggs a day and know which chickens are laying them. Over the last week we have gotten two eggs that are an ivory color about the same size as the brown eggs... maybe a bit smaller. What do guinea's eggs look like? I wasn't expecting any in the winter but I can't think of who else would be laying them.