Sentence:  At about one o'clock we finally put Araby in her stall, but she kept getting cast. She would roll over, hitting the side of the stall with her legs and was unable to get up. ... We had to <WSD>uncast</WSD> her every fifteen minutes from one <small>A.M.</small> until seven the next morning. 
Meaning of the word marked with <WSD> tags:  To bring back to a standing position (a horse or other large animal that is lying down with its legs under it).