Stonerside Stable's Congaree, who has earned more than $3.25 million so far in his career, was expected back at Bob Baffert's barn at Keeneland Racecourse Thursday morning after being treated overnight for colic at Hagyard-Davidson- McGee veterinary clinic near Lexington, Ky.Although the problem was not serious, it was sufficient to knock the 6-year-old son of Arazi out of the April 10 Commonwealth Breeders' Cup Stakes (gr. II) at Keeneland.Baffert said the condition was detected soon after Congaree arrived Wednesday following a flight from California that included a stopover in Arkansas. The horse was initially treated at the barn but was taken to the clinic when his condition didn't improve."He's going to be OK," Baffert said. "Sometimes they come out of it after you treat them, but he didn't. And once you treat them this close to a race, you have to scratch anyway."In his only start this season, Kentucky-bred Congaree finished fourth in the Jan. 31 San Antonio Handicap (gr. II) at Santa Anita Park. Last year, Congaree won five of nine starts--three grade I stakes and two grade II stakes--at distances from seven furlongs to 1 1/4 miles.Congaree, who was bred by Stonerside, has won 12 of 24 career starts. His strongest season earnings-wise was 2003, when he banked $1.6 million.