Published: Sep 22, 2010 11:44 PM EDT
Updated: Sep 22, 2010 8:41 PM EDT

NAPLES, Fla. - Robert Klatt says his nightmare started when he left his dog Max at Doctor Amy's while he was away on business. He's a pilot for a major airline. 

"He called and told me my dog had aggressive bone cancer," said Klatt.

Klatt says the man he knew as Doctor Larry gave his dog several painful tests and charged him more than $3,000 without getting permission.

"It was very frightening. I asked him why he did it. And I said Larry how much is this going to cost? He said he had no idea,"  said Klatt.

Klatt didn't pay for the tests because he didn't ask for them. Collection agencies started calling him and that's when he filed a formal complaint with the state. Just weeks later he says Eugene "Larry" Gentsch went after his job.

He called the airline and told Klatt's bosses he flies airplanes drunk.

"He was drunk in Atlanta and went and flew, and it wasn't the first time," he told an airline representative.

Klatt said he went through an embarassing investigation at work only for the airline to find out none of it was true.

"I knew why he did it. I just recently sent the state complaints," said Klatt.

Klatt's dog died months after his treatment with Doctor Larry. He has no proof the animal hospital had anything to do with it but he says hearing other victims stories makes him suspicious.