White ducks feathers yellow after molt

[cheezenkwackers]

I suspect it is just getting extra carotene (xanthophyll is one type of carotene) in what she eats. Carotene is a yellow/orange pigment found in most leaves and yellow or orange vegetables like corn. It also is what gives ducks yellow/orange bills and feet and makes yolks that color. Purina duck has lots of corn in it and if yours are free ranging they are getting even more. I suspect it will be gone with the next molt since she will be laying by then and any extra will go to the yolks. I wouldn’t be worried about it, she is just healthy.

 

[HollowOfWisps]

Another suggestion is if you have hard water and are filling a duck pool with it the hard water can turn anything white to a yellow or even orange tinge. We have hard here and I have to use a de-mineralizer on my blonde hair once a week otherwise it turns yellow/orange