ohmidog!

Here’a a preview of tonight’s “Dog Whisperer,” in which Cesar Millan helps “Biggest Loser” trainer Jillian Michaels with a dog that goes nuts whenever she climbs aboard her horse.

Michaels, a fitness trainer and life coach, says her 14-month-old greyound mix, Seven, has been exhibiting the behavior for seven months. While her horse, Buzz, tolerates Seven’s yapping and nipping, Michaels was worried that it could lead to the dog getting hurt or even killed.

Millan solves the problem in a matter of seconds, climbing on back of Michaels’ horse, and simply leading the dog along on a leash. That, Millan says, gives the dog a purpose — following along — and brings the barking and nipping to an immediate halt. In time, Millan predicts, Seven will learn to walk alongside the horse without a leash.

Tonight’s show also features Sara, a German shorthaired pointer prone to escaping, and a Yorkshire terrier named Madeliene who reacts adversely to brooms and windshield wipers.

The episode airs at 9 p.m. on the National Geographic Channel.