There are several good articles on pet rabbits at: www.drsfostersmith.com
and click on "articles." I think the biggest danger to house rabbits is that they can get sick from eating carpet fibers and other things that block their digestive system. Outdoor rabbits get sick when they get wet and are not protected form the elements. Rabbits can be litter box trained, although not as easily as a cat, and most will leave some dropping to mark their territory. They live to be 8 to 10 years old, although some live longer. They need to be spayed/neutered to make great pets. Some become aggressive when they mature, but having them neutered usually takes much of the aggression away. I hope this helps.