Official documentation from a breeder organization certifies purebred status.
Registration Papers
Conformation to a standard for a breed's physical form like Siamese coloring points to origin.
Distinctive Features
Temperament adherence like a Rex's playfulness points to genetic continuity.
Personality Aligns
If both parents were registered purebreds, offspring likely is too.
Known Parents
Qualities like a Persian's fluffy fur and flat face meet breed ideals, not random mutations.
Desired Traits
Susceptibility to genetically carried conditions associated with the breed indicates purity.
Typical Health Issues
Experienced vets, breeders and show judges can often accurately identify purebred cats by sight.
Expert Opinion