The rabbits were humanely trapped and spayed or neutered. Dogs shown in the conformation ring are not allowed to be either neutered or spayed. Spayed/neutered dogs have twice the risk of intact ones to develop osteosarcoma. Males neutered in adulthood may still spray after neutering. Oriental Shorthair cats have a lower incidence of overweight when neutered. Neuticles are prosthetic testicular implants for neutered dogs and other domestic animals. British Longhairs can be prone to obesity if neutered or kept as indoor-only cats. It may be particularly useful for controlling such behaviors in neutered male cats. Certain health problems have also been linked to ferrets being neutered before reaching sexual maturity. The word Champion is replaced by Premier for neutered cats. In the United States, about 80% of household cats are neutered. Males, if not neutered, are extremely musky. Males should be neutered between 3 and 4 months of age. Eve mentions later in "Memory in Death" that the cat has been neutered. In Rome, they are surgically neutered by veterinarians of the Veterinary Public Services.