Can anyone tell me if this is a duckling or a gosling? We rescued sereval eggs and have hatched 4 of them so far. 3 of them are definitely ducks, but this guys had a much bigger egg then the others and he is growing at much quicker than the others. He is three times the size of the others that hatched the same day. They are now 2 weeks old. (We’ve kept chickens before but never ducks so we are learning as we go.)