Vaders led all trainers at Philadelphia Park last year with 117 victories and is third in the local standings.

Chris Ryder, a spokesman for the commission, said the group approved the revocation of Vaders' license following seven positive drug tests for her horses since 1995, the latest in February of last year.

Six of the positives were for Class 3 drugs and one was for a Class 2 violation, Ryder said. Class 1 drugs are considered performance enhancers and the others less severe.

Under current regulations, the track stewards are permitted to revoke a license after two or more positive tests.

Alan Pincus, a Las Vegas attorney representing Vaders, said his client's due process was violated from the beginning of what he termed a "ridiculous" set of obstacles and regulations.

Pincus said it could be years before Vaders' appeal was heard in the Commonwealth Court in Harrisburg.

Vaders claimed a horse on Tuesday at Philadelphia Park and has five runners on today's program.

Toms River OTB opens. The joint venture of Philadelphia Park and Penn National will debut at noon Tuesday.

The 26,000-square-foot parlor, nearly twice the size of the Vineland facility, features a huge circle bar and is at the intersection of Route 37 and Bananier Drive.

New Jersey has an additional off-track parlor in Woodbridge.

Atlantic City. The Mays Landing track completed three days of racing yesterday with crowds of around 3,500 and an average handle of about $128,000.

Three more afternoons of racing will take place from Wednesday through Friday, with all wagering at the track itself.

Simulcasting was halted because of a failure between the track's owner, Greenwood Racing, and the New Jersey horsemen to reach a contractual agreement on several issues.

The track could race for 20 days next season if it is alloted a share of money targeted by the New Jersey casino industry.

Another filly story. Rags to Riches' victory over Curlin in last year's Belmont Stakes sparked interest in filly-vs.-colt rivalries.

Eight Belles, owned by Rick Porter of Hard Spun fame, could start in next Saturday's Kentucky Derby if her connections feel comfortable with her spot in the starting gate.

Post positions for the Derby, with another full 20-horse field expected, will be drawn Wednesday.

A difficult post for Eight Belles could find her opting for the Kentucky Oaks on Friday.

Churchill Downs will open its 2008 spring meeting this afternoon.

Cloning around. The ESPN newsmagazine E:60 will feature a story on cloning at 7 p.m. Tuesday with an emphasis on horses. ViaGen, a company in Austin, Texas, is cloning Scamper, considered the greatest barrel racer ever. "We have a number of horses [thoroughbreds] that would be well-known in our gene banks," ViaGen executive Blake Russell said.

It sounds a little scary, but perhaps it could solve the brutal horse shortage at the Mid-Atlantic tracks.