How often you see piebald or albono deer has a lot to do with the genetics of the herd in your area. I' ve seen a picture from Wisconsin where you can see 2 albino deer, a good buck & a fawn.
Has anybody seen a leucistic deer? That' d be a deer with white fur, but everything else is normally colored. True albinos have pink eyes & noses.
I saw a leucistic squirrel once on a golf course.