This is a quote from the book "Animal Farm" by George Orwell
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After his hoof had healed up, Boxer worked harder than ever. Indeed, all the animals worked like slaves that year. Apart from the regular work of the farm, and the rebuilding of the windmill, there was the schoolhouse for the young pigs, which was started in March. Sometimes the long hours on insufficient food were hard to bear, but Boxer never faltered. In nothing that he said or did was there any sign that his strength was not what it had been. It was only his appearance that was a little altered; his hide was less shiny than it had used to be, and his great haunches seemed to have shrunk...

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