Mister Frisky, the beaten favorite in the Kentucky Derby, was responding to treatment yesterday in Clarksburg, N.J., and gaining in his battle against a life-threatening abscess.

The colt, who finished third in the Preakness May 19, "is alert and responsive, breathes normally and can eat hay and drink water with little difficulty," said Scott E. Palmer, surgeon at the New Jersey Equine Clinic. "He's not out of the woods yet but he's making good progress and we can relax a little."

The colt was reported in stable condition, responding well to antibiotics, but remained in intensive care and was being monitored around-the-clock. Palmer said the abscess was lanced and drained and the infection did not appear to have spread. The colt was being given medication for a slight fever.

Pimlico: Pimlico and Laurel will offer simulcast wagering on the $1 million Hollywood Gold Cup on June 24, it was announced in Baltimore by track president Joe De Francis.

The Gold Cup, at 1 1/4 miles, will pit 1989 horse of the year Sunday Silence vs. Criminal Type, who won the Pimlico Special and Metropolitan Handicap, and Breeders' Cup Turf winner Prized. Although post time for the Gold Cup will not be until 8:30 p.m., 2 1/2 hours past Laurel's final race, the race will be taped and broadcast at 11 p.m. as part of "Racing From Laurel" on WFTY-TV-50.

Laurel and Pimlico experimented with simulcast wagering on the $1 million Santa Anita Handicap, which also was run about 2 1/2 hours past the final live event, on March 4.