Whites for the show tables are ideally the cleanest white possible. This isn't always that possible, so slight yellowing around feet, bottom, and what-not is usually not too harshly faulted. Ivory colored whites, and severely stained whites are harshly faulted for their color. Whites have to have all matching toe-nails (as do ALL of the varieties), but these-unlike the rest of the varieties, must all be white. I've never heard of problems with white coloration in these respects, but if someone ever has any-best to cull it right on outta there!
The thing that is so special about whites (any breed) is that white, REW (ruby eyed white) that is, isn't a true color. It isn't man-made, like the steel, but it's not a genuine color either. Only BEW (blue eyed white) are truly white. Ruby-eyed whites, or ermines, are also called "albino", meaning they have no pigment. This is a genetic flaw, or defect, that is recessive in trait, and breeds true (white to white=white). It can occur from any color of parents (black to black=white), therefore the way it breeds into different colors is also tricky. When breeding for steels, whites are a good variety to keep around (why???). Make sure, however, that these whites are black, steel, or light gray in the backgrounds. You do NOT want sandy or fawn in the steels. If you breed a white with sandy and/or fawn heritage, it is the equivalent of breeding sandy/or fawn. Meaning, the white masks a true color, and that TRUE color is what affects the varieties that the white is bred with, not the white itself. When buying whites, look into the background FIRST!
GENETICS OF A WHITE:
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Nothing can be told of a white by its color. Whites are albinos, a "lack of color" which comes about from the full color gene series (C series). The recessive gene of the series "c" when matched up together stops the production of pigment all together and thus creating an albino. The rabbit could be any other color except those colors dictated by the same gene series. Whites can never be light grays, for example, but can be blacks, blues, steels, fawns, sandies and colors we couldn't know (or wouldn't want to)! The only way to tell what your white has behind it, other than a pedigree, is to start breeding it to other colors. Breed it to black or blue to see if it has a self gene. If you get light grays or sandies then it has an agouti gene, if you get NO selfs at all, then it's probably got double agouti gene "AA". If you breed it to blue and get no blues or diluted colors you probably have an intense color bunny 'DD" otherwise if you get both black and blues you'd have "Dd" or all blues it would be "dd". Always be cautious when using whites from backgrounds you are not sure about. It is just as detrimental to breed in a white from sandy backgrounds to black/blue/lt gray/steel as it is to breed in a sandy itself.