Hi there. I know this is probably a dumb question but is there a way I can tell if these eggs are from my chickens or ducks. I know that duck eggs are bigger than chicken eggs but since these are the first eggs from any of them and they are always together (the chickens and ducks) I'm not sure who laid the egg(s). One from yesterday (smaller) and today. The chickens and ducks are the same age (about 20 weeks). The bigger egg is about the size of a jumbo store bought egg. Thanks.