knuckling

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knuckling

a forward bending at the fetlock joint. May be a feature of the conformation or a sign of neurological deficit. Called also overshot fetlock.

knuckling over
sometimes used synonymously with knuckling. Also refers to weightbearing on the dorsal surface of a flexed foot or paw; often a sign of deficit in normal proprioception that would reflexly cause a repositioning to the normal position.
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Knuckling over. By permission from Nelson RW, Couto CG, Small Animal Internal Medicine, Mosby, 2003