The Kentucky Derby winner coughed a few times on Thursday, the result of a small blister in his throat that itches.
Alan Sherman, Art's son and assistant trainer, said the blister appeared before the Derby and is being treated with a glycerin throat wash.
"After he ran in there, it came back a little bit," Alan Sherman said. "It's not a big deal at all."
That didn't prevent chatter that something was wrong with California Chrome and could affect his status for Saturday's Preakness Stakes.
Sherman Racing Stables responded on Twitter, saying, "Chrome is fine. Vet stopped by to scope him and draw blood. Blood came back perfect. He is eating/acting normal."
California Chrome visited the Pimlico starting gate Thursday, another step in making sure he is comfortable with his surroundings.
"He just walked in there and relaxed," Art Sherman said. "There were a couple guys from Churchill Downs that were working on him. They knew him. He's perfect."
Ideally, every horse is pointing squarely at the racetrack when the gate springs open. California Chrome tends to rock side-to-side in the gate and that can leave him slightly off-balance when the bell rings.
"Sometimes he'll get off just a shade slow," Sherman said. "That can mean a length or two leaving there. That means you have to ride a different kind of race."
California Chrome Heavily Favored For Preakness
Jeannine Edwards has the latest on Kentucky Derby winner California Chrome, who was heard coughing after his daily gallop leading up to the 139th running of the Preakness Stakes.