Hello, I have 2 ducks with feather problems. I have checked them for ticks, didnt see any, but treated them both anyway, and treat their coop, every other week. One of them, is a year old cayuga, she is balding, and very greasy looking, the bathes regularly in my pond, which is a regulary, in the ground, man made dug out pond. Her oil glad looks normal. The other duck is a 2 year old pekin, when I first got her, her feathers were very... droopy? Looking. I thought maybe it was what she was being fed, as she was only being fed layer mash before I got her. Now she is being fed flock feed (purina) mixed with cracked corn. And she used to just absorb water, but now its only her wings that do. Her oil gland looks normal... but is not oily. Its not irritated looking or anything. Just not oily. She LOVES to swim, but I always fear she will become water logged, and drown. Her wings do not seem to properly clean when she preens herself. they stay a brownish tint, while the rest of her is white. Does anyone know how to help?