I have two Pekin ducks that are about 9-10 weeks old and I think they might be shedding possibly juvenile feathers? They're chest and underside area is starting to look a bit shaggy likes it's missing some feathers, is this normal and if not are they sick or what? After swimming they get out of the pond and drop like 20ish feathers, has anyone else had this happen with ducks at this age?