I have several does of varying breeds, some are pure white some are paint with a snow white background, 2 are traditional boer with redhead. The white on all of them is turning cream to light brown. I have bathed and clipped them, but no one is pure white anymore, the lone exception being my saanen buck. I figure it must something in the soil or water, but what? They browse on 18 acres of scrub, trees, weeds and grass almost exclusively. They get daily treats of sweet feed mixed with BOSS. They drink city water from a trough but also like to sip from 2 small ponds. Any ideas? Their overall health is wonderful and they seem happy and stress free, beautiful and bountiful kids, just changing colors!