It can provide clues about its breed, as different breeds often have characteristic tail shapes, lengths, or fur patterns. For instance, breeds like the Manx have naturally short or absent spinal extensions, while others, like the Maine Coon, typically have long, bushy ones. However, while it can be a distinguishing feature, it's not always definitive for breed identification, as individual variation and mixed ancestry can also influence its appearance. Other physical traits, such as body shape, coat color, and facial features, are usually considered alongside the spinal extension when determining a cat's breed.