The Great Gatsby

The Great Gatsby, Airedale concerned in it somewhere

Could you please tell me the literal meaning of "concerned" and "somewhere" in the following excerpt from The Great Gatsby by F. Scott Fitzgerald, chapter Two? I understand that the expression means that the narrator is stating that there was no doubt about the dog being partly an Airedale, but I don't see the sense of "concerned" and "somewhere".

The airedale—undoubtedly there was an airedale concerned in it somewhere though its feet were startlingly white—changed hands and settled down into Mrs. Wilson’s lap where she fondled the weather-proof coat with rapture.

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He is just alluding to the idea that airedale was "concerned" or mixed "somewhere" within the breed of the dog.