So I have a friend who I trying to help out. She owns 3 canadian geese. One is sitting on a large clutch of eggs 15? I think she has all girls and the momma is sitting on a nest waiting to exploid. She has never had them hatch a gosling nor has she ever tried to incubate the eggs to check for fertility..So I am hoping you awesome folks can show me hptos of your boys and girls and tell me what the difference is so I can tell her what she has? thanks so much!!!