What a bummer. It's certainly a disappointment, but don't feel like a dunce. It sounds like maybe there was something missing in the instructions you got from the other folks. And you're right, showing rabbits is a lot different from showing large stock. I started showing livestock in the rabbit world, where altering the animal's natural appearance in any way - dyeing, bleaching, plucking, etc. - results in the disqualification of an exhibitor's
entire entry. So when I went to a large stock clinic and heard instructions to use baling twine and glue to fit steers, rub oil on hogs, and use whiteners on sheep, I was fairly appalled. Different worlds!
But white rabbits are notorious for being pigs.
If you have a sprayer, or a rabbit that lies in its own waste, you can bet it'll be the white one, or a broken if you don't have whites. I had a white Satin that made a pile of hay in the corner, peed on it regularly, then rolled and sat in it all day.
She was incorrigible. No show career for that pretty (but smelly) bunny. I've since quit giving the rabbits loose hay.
So it's a challenge, but there are some things you can do. First, prevention is golden, since the longer they're yellow, the harder it is to get out the stains. If you've got a pig in rabbit's clothing, try to figure out how to fool it into staying clean. Sometimes for me that's been putting up solid barriers between a nasty spraying buck and his neighbors (but the barrier had to be outside the wire walls of his cage, and an inch away from them, since if it was inside or up against the cage wall, he'd spray it and then rub himself on it). It's definitely meant keeping the rabbits in all-wire cages with no solid floors or walls. Sometimes it's meant taking away the sitting board and replacing it with a plastic mesh resting mat. Holland bucks are the
worst, and even our tort bucks can look stained. While they're young (meaning anything under 5 years old), we often have to bathe them several times between shows, and again a day before the show, and then bring bales of baby wipes with us to the show.
No matter what, though, white rabbits will get dirty. The best approach I've found is to use corn starch; sprinkle it into the fur and rub it around, and let it sit for a while before brushing it out. This won't take out horrible stains, but it's amazing how much better the rabbit can look afterwards, especially if the pee was still wet. You might have to do it more than once.
People do use hydrogen peroxide, and it will get out harder stains, but it's really best for all-white rabbits (as you found out). I don't like to use it, though, because if you leave it in too long it can stain even white fur; it can also subtly change the texture of the fur, which I don't like.
If you're new to showing, you might be relieved to hear that yellow on the
bottom of the feet is rarely cause for even a comment. If the whole foot or the hind end is stained, or the feet are sticky and smelly with urine, that's a problem. But most white or white-footed rabbits have yellow soles.