What structural trait distinguishes the Wire Fox Terrier from the Smooth Fox Terrier?
Answer
A hard, dense, and distinctly wiry outer coat
The fundamental distinction separating the Wire Fox Terrier from its sibling breed, the Smooth Fox Terrier, lies entirely in their integumentary structure, specifically the coat type. The Smooth Fox Terrier possesses a coat that is short and flat. Conversely, the Wire Fox Terrier is defined by having a hard, dense, and distinctly wiry outer coat that is accompanied by a softer undercoat. This difference in coat texture is significant enough to warrant recognition as two separate breeds, even though their broader biological classifications—Kingdom through Genus—remain identical.

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