From SI cover story this week:

https://www.si.com/horse-racing/2022/05/04/kentucky-derby-bob-baffert-medina-spirit-controversy-horses-daily-cover

The powerful chestnut colt might be the most unseasoned Derby runner ever, running just two career races and somewhat ominously landing on the Santa Anita “vet’s list” after winning his debut in early March. That means veterinarians had a physical concern about Taiba, who is owned by the owner of Medina Spirit, Amr Zedan. Taiba was listed as “unsound,” indicating a likely leg issue. According to Santa Anita blogger Jeff Siegel, who was there, jockey John Velazquez eased the horse up quickly after the race and walked him slowly back to the winner’s circle. At the time, Baffert told Siegel, “Johnny thought he felt something funny behind, so he pulled him up. By the time he got back to the winner’s circle, the colt was fine. I don’t know if he was put on the vet’s list, but it was nothing.”

Once on the vet’s list in California, Taiba had to wait seven days before recording any timed workout and 15 days before an official workout (which is different from any timed work, per the California Horse Racing Board’s Mike Marten). Taiba also had to pass pre- and post-work vet examinations, meet a minimum time standard and submit to post-work sample testing.

Taiba returned to the work tab March 18 and recorded three official workouts before surprisingly entering the Santa Anita Derby off one career start, then more surprisingly winning it by passing Messier in the stretch and pulling away. That punched his ticket to Louisville, but Yakteen has worked him only once since that race, 19 days later and nine days before the Derby.

Baffert customarily works his horses hard and has them dead fit for big races. Yakteen has taken a different approach, putting a lightly raced and lightly conditioned colt into a 20-horse alley fight. It’s a bold deviation. “I wanted to make sure I was bringing a horse to Kentucky with a full tank,” he says. “It would do me no good to take a horse that I misread to Churchill and have him underperform because I over-trained him.”

He did add an easy 3/8 work this week but no signs of unsoudness or dealing with
any known issues for what it's worth.