John Parkin from the University of Bolton, who also took part in the study, had the following explanation.

参与本次研究的还有来自博尔顿大学的约翰·帕金(John Parkin)，他给出了如下解释。

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Dr. DEAN RICHARDSON (Chief of Surgery, New Bolton Center, University of Pennsylvania): We try to manage it with - initially with a cast then with the brace, and neither one of them was working satisfactorily, which is why we had to go to the much more potentially serious technique.

NPR: Ailing Barbaro Recovering from New Operation

David Rudd, professor of children's literature at the University of Bolton and an expert on the author, said Enid Blyton's stories had been seen as racist since the late 1960s, with the idea gathering momentum in the 1970s and 80s.

BBC: Enid Blyton

Richardson, who operated on Barbaro at the University of Pennsylvania's New Bolton Center for Large Animals on Sunday, said the horse's chances for survival were still 50-50.

NPR: Barbaro Makes Progress After Leg Surgery