Willoughby the Dog from the Warner Brothers cartoon, Of Fox & Hounds although, it's a reference to Of Mice & Men, hence the similarities of the titles.
It was said by other characters but originated with Willoughby. See Provided Link.
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The address of the Willoughby Branch Library is: 30 Public
Square, Willoughby, 44094 7854
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Kira Willoughby's birth name is Laura Willoughby.
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Willoughby Speyers's birth name is Albert Willoughby
Speyers.