had several white calves the past couple years and always get comments on how i keep them so white...fluffer hit the nail on the head...keep him clean!!! keep the stall clean!!! and i use sawdust for bedding....no staining from mulch...and then use some kind of blueing shampoo as red mentioned...i always use sullivan's bright lights or white lightening, i think they have one or two products....word of caution though...do not apply it directly to the animal and then start talking to someone before scrubbing it in....i got a little distracted one day at the wash rack at a show and ended up with pink lines down my heifers back where i had squirted it on her and then started talking to someone....now i always put it on my brush and scrub it in....once its scrubbed in, you can let it set for a few minutes....