A cant-hook, used in logging.

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1850.  With entire self-possession, leaning on a cant-dog, he could talk with Melicent and Barbara in the Mill.—S. Judd, ‘Richard Edney,’ p. 272.

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1851.  All hands are … lifting with heavy pries, hand-spikes, and cant-dogs, to roll these massive sticks into the brook channel.—John S. Springer, ‘Forest Life,’ p. 156 (N.Y.).

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