Creature Classification

There was an un-debate; for Scavenger Hunt, one of the items you can wind up searching for is a "four-legged creature". My opponent went searching, and grabbed Complaints Clerk. I objected on the grounds this was clearly a humanoid sloth using what appeared to me to be distinctly functioning as arms and legs, ergo not four legged. My opponent countered that it was a sloth, sloths are four-legged, therefore this was a four-legged creature. The store owner felt yes, judge felt no. Who was closest?

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Humanoid animals have two arms and two legs, not four legs. A normal sloth would have four legs.