At what age should rabbits spayed or neutered?

Females can be spayed as soon as they sexually mature, usually around 4 months of age, but many veterinarians prefer to wait until they are 6 months old, as surgery is riskier on a younger female rabbit. Males can be neutered as soon as the testicles descend, usually around 3-1/2 months of age, but many veterinarians prefer to wait until they are 5 months old.