Some vets will provide painkiller for your bun. The one time injection seems to block the pain enough that she can get started on the road to recovery. This is not always necessary, but has helped many females at our shelter. Neutering a male rabbit, when done by an experienced vet, is less of a problem. Most males come home from the vet looking for something to eat, and are ready to play within 24 hours.
Neutering can decrease the rabbits aggressiveness.
Unneutered males typically have very strong smelling urine which goes away following neutering. The mature house rabbit should receive a diet composed of hay, veggies and some pellets. A house rabbit should have access to hay at all times, not only does this keep the digestive system working, but it also helps prevent the formation of hairballs. A rabbit will also benefit greatly from daily veggies, at least 1 heaping cup per 5 pounds of body weight. Veggies should be introduced to the rabbit one at a time.