So, I have six Muscovy Ducks (three males, three females) and all of them have lost their waterproofing in their feathers
. After they go take a bath, they come out soaking wet and they spend an hour drying off. Is their oil gland messed up? Or is there something I can give them, so their waterproofing can come back?
P.S. When do Muscovy Ducks molt?

P.S. When do Muscovy Ducks molt?