Jenluckenbach is correct, bunnies, as a rule, do not smell. There is no way I would have 8 bunnies indoor bunnies if there was an odor problem. My guess is whoever said that either did not change the litter boxes frequently enough (in the hot summer I will do it twice a day!!!) Also spayed/neutered bunnies urine is less strong because they are not trying to attract mates.

I will admit that I have a chronically ill elderly bunny who unfortunately sits in her pee. so she gets a butt bath about ev 2 weeks. It's not clear if she has some arthritis going on or is just lazy, but she is one of the sweetest little girls I've ever had and I put up with her problem because I'm not sure how much time she has left. She is a cuddler so I just wrap her up in a bath towel when we are having conversations or nap time. She is definitely worth the work.