Anna, we have a pet bunny that sheds insanely. What we give him is a standard furball remedy paste (petroleum product with malt) that's made for cats, and he's been fine since. He still sheds, but his digestive tract doesn't shut down anymore. Rabbits actually are more prone to ill effects from furballs because they can't cough them up like cats do, and this stuff has worked great.

Good luck!

RF