Gus the dog was living a luxe lifestyle: He had his own agent and was training for work as an advertising model.

That is, until the rare, cream-colored dachshund disappeared a few weeks ago. Now the dog's owners have hired a publicist and a private detective, and they've papered several Westchester County towns with posters promising a $2,500 reward.

His owner, Ken Chandler, former publisher of the New York Post, says Gus ran off while they were taking a walk in Teatown Lake Reservation in Yorktown.

"I was walking him, and he slipped off his leash," said Chandler, now a media consultant and strategist. "He was chasing after something, which he's done before. He's always come back, and this time he didn't, which made it unusual."

Now Chandler, his wife and their five children believe someone may have stolen Gus.

Yorktown police Lt. Kevin Soravilla said officials are on the lookout for the dog, but they have no evidence Gus was stolen.

"I hope they locate the dog," Soravilla said. "But there are coyotes in the area, and they've been known to take a dog down."