Spraddle leg is a condition in poultry in which the legs of newly-born chicks are splayed laterally, meaning that they are unable to bear weight. The cause has been attributed to a range of factors, although a slippery floor surface is most commonly implicated. Management focusses on the use of supports (or shackles) to bring the legs back towards the midline.
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Spraddle leg Wikipedia(Text) CC BY-SA