Former claimer Big Macher, a two-time stakes-winning sprinter at the current Santa Anita Park meet, was vanned off following a five-furlong workout in :59.80 the morning of May 10.
Trainer Richard Baltas said the 4-year-old California-bred son of Beau Genius was not in a life-threatening situation.
"He was a little off in his right front foot, but we pulled the shoe off, treated him, and he's resting comfortably in his stall," Baltas said.
Big Macher has developed into one of the best sprinters at Santa Anita this spring.
The bay gelding, owned by Tom Mansor and Tachycardia Stables, was coming off a thrilling nose victory over favored Wild Dude in the Potrero Grande Stakes (gr. II) April 12. He finished half a length behind Sahara Sky when second in the San Carlos Stakes (gr. II) before that, an effort that followed a dominating win over state-breds in the Donald Valpredo California Cup Sprint Jan. 25.
HIs work over the Santa Anita main track Saturday was the second fastest of 47 at the distance.
Big Macher was claimed out of his first start, a seventh-place finish July 17 at Del Mar, for $20,000. Since then, he has four wins, two seconds, and two thirds from 10 starts while earning $316,428. Big Macher originally raced for Doubledown Stables and trainer Peter Miller.