Trainer Paul Nicholls said Kauto Star, whose participation in the Gold Cup was in jeopardy following a schooling fall a fortnight ago, had returned from the race unscathed.
He said: "He's absolutely fine.
"Ruby wasn't happy after he'd jumped a couple of fences and we said if he wasn't happy to pull him up, and he's done the right thing.
"There's obviously something tweaking him."
Following the race he tweeted:
KAUTO STAR FINE.
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One story dominates Thursday's front pages with some newspapers printing emotive pleas to voters to keep the United Kingdom as one.
After a mild start temperatures should pick up, with the south of England seeing highs of 26C.
In Edinburgh tonight you can hear it and feel it. The buzz, the banter of the day and the thrilling sense something big is coming tomorrow.