Rabbit Neutering 

MALE RABBITS (bucks) are usually bolder than females. They are responsive and enjoyable pets, but most are territorial and frequently spray urine, and aggression is a common problem. Neutered males are much happier and more relaxed. They can enjoy life without constantly looking for a mate and are much less aggressive. If carefully introduced, they can live with a spayed female or even another neutered male. Neutered males will stop spraying urine even if the operation is performed later in life.
FEMALE RABBITS (does). Having female rabbits spayed is equally important. Most female rabbits become territorial and aggressive from sexual maturity onwards (4-6 months). They often have repeated false pregnancies, and may growl at, bite and scratch their owners as well as other rabbits. Keeping two females together (even if they are sisters) tends to make things worse. Spaying reduces (and sometimes eliminates) all these behavioural problems. Spayed females are likely to live longer lives than their unspayed sisters. Up to 80% of unsprayed female rabbits develop uterine cancer by the age of 5. Females who are not spayed when young and in good health may have to undergo the operation as an emergency in later life (e.g. cancer or pyometra) develops