Dr. Baldharan was a man who was heavily implied to be the owner of an animal fighting ring. He met Ross very briefly in "The One With The Fake Monica". He was portrayed by Harry Shearer.
From his limited interaction with Ross, Baldharan seemed to be a horrible, compassionless, amoral individual who seemed to have little concern for the animals under his care so long as he could make some money from the smurfing.
When Marcel started humping everything, Ross started looking for a zoo to give him away to, and ended up meeting Baldharan for an interview in the coffee shop.
Though Ross had no idea that Baldharan's "zoo" was an animal fighting ring, Baldharan seemed to think he did know this, confusing him with questions such as if Marcel would fight other animals if cornered and if he was capable of handling a hammer or small blade.
Joey and Chandler irritated Baldharan by crassly bursting into the shop with Marcel in order to tell Ross that the monkey had been accepted into San Diego Zoo. Baldharan then promised Ross that he would "start (Marcel) off against a blind rabbit and give (Ross) twenty percent of the gains."
The scene ends with Ross, Joey and Chandler backing away from Baldharan in horror at his apparently compassionless personality; he was never seen again after that.