I have three ducks. John (black Swedish), Micheal (Blue Swedish), and George (khaki campbell). George has an enlarged chest. I am not sure what is going on. I've attached some photos so you can see what I am talking about. Is this normal? What is going on? Does this look like she isn't eating enough? Or is she eating too much? Or is this a common look for ducks? My two other ducks (as well as past ducks I have owned) have not looked like this. I am worried, but not too worried since her behaviors are the same as they have always been.