Pony Twinkleheels in "New Shoes"

The blacksmith patted Twinkleheels and picked up one of his forefeet. Then the blacksmith took a chisel and began to pare away at the horny hoof. Twinkleheels looked over the blacksmith's shoulder. And what he saw gave him a start. "Great green grass!" he cried to Ebenezer.
"Is he going to cut my foot off?"
"No, indeed!" Ebenezer answered. "The blacksmith always pares my feet a bit when he fits new shoes. He may have to trim yours a good deal, because you've never worn shoes and your feet have never been pared."