I would have to see a picture.
And as far as bay dun and buckskin: A bay dun is a "flatter" color than buckskin. They might be shiny, like the one above, but the color is still a duller shade. A buckskin is gold and will have a gold-tinted shine to them.
Buckskins also may have dorsal stripes caused by countershading, but will not have leg barring unless they are also dun, making them a dunskin.
Do some reading from this website. It will help. www.morgancolors.com