Neutering rabbits provides significant welfare benefits beyond preventing unwanted litters, including reduced cancer risk and improved behaviour.
Uterine cancer in unspayed female rabbits is almost inevitable if they live to middle age, causing chronic pain that is often undetected until the disease is advanced. Hormonal fluctuations in entire female rabbits cause periods of aggression and territorial behaviour that stress the rabbit and complicate handling. Entire male rabbits may develop hormone-driven territorial aggression that results in injury to companions or owners. Neutering is one of the simplest welfare improvements available to rabbit owners.