What color silkies hens do you have available and how old? And are you willing to sell 2 hens together? I already have a partridge rooster and a blue hen.
it ends up working out like a cat box. you'll need to sift it out eventually or it will just keep building up in little clump balls. plus, if water spills on it, it becomes saturated and could potentially be a breading ground for bacteria and bugs if not cleaned regularly. that's my experience...