Crate: Portable container used for shipping, transporting, or housing animals.

Crepuscular (or Nocturnal): Becoming active at twilight or before sunrise, as do bats and certain insects and birds.

Crossbred: A cat whose sire and dam are representatives of two different breeds.

Cryptorchid: The adult whose testicles are abnormally retained in the abdominal cavity. Bilateral cryptorchidism involves both sides; i.e., neither testicle has descended into the scrotum. Unilateral cryptorchidism (also called monorchid) involves one side only; i.e., one testicle is retained or hidden, and one is descended.

Cymric Cat: A longhaired breed of cat medium length double coat that is dense, full and silky in texture.