What litter material do you use? I like to put hay on top of horse bedding pellets or wood stove pellets, because the pellets soak up the pee, and the hay allows the pee to drain through, without puddling and causing wet fur. I think if you find a beddign material that allows the pee to drainthrough immediately, you’ll have less icky fur. For bunnies who like to flop in litter boxes and there are sticky cecotropes in the litter box – tough one. Ideally, yoru bunnies are eating thei cecoptropes. Occasionally, you’ll find uneaten ones. I find that my pair that are the best hay eaters, never leave uneaten cecotropes. Young bunnies that are starting to produce them, don’t necessarily eat all of them. So in that case – I’d go back to using hay on the bedding, because the uneven surface will help to hide the cecotropes.
Cadbury is about a few weeks away from being able to impregnate his mom. Unless you want one-eyed, 7-toed 9-legged rabbit babies, I’d start to separate them 🙂