Does a rabbit need its nails and teeth trimmed?

Nails definitely need to be trimmed, just like any other animal and us. With teeth trimming, it depends. Some rabbits, unfortunately, have genetic predispositions where they do need them trimmed, but in general, the average rabbit should be able to keep their teeth worn down just by eating hay. That is definitely a professional matter. If your veterinarian says that it needs a tooth trim, it's done under anesthesia.