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Two dog breeds renowned for their uncanny smiles — the Lancashire heeler and the Samoyed — were pitted head-to-head in a “smile-off” contest at the National Dog Show press preview in Philadelphia last week, shepherding in howls of laughter from the crowd and confused head tilts from the contestants.

These noble descendants of wolves, bred to strike fear in the hearts of livestock with their impeccable herding skills, just had to grin and bear the attention lavished upon them. Sometimes being man’s best friend is ruff (and very silly).