Can you believe they're at 100 already?! Yesterday, the National Geographic Channel taped a special celebration in Burbank to mark the 100th episode of the Dog Whisperer With Cesar Millan. It actually included a reunion of over 75 dogs and hundreds of owners who appeared on the show during its past four seasons . . . oh, and cake. The event also included two special sweet snacks, the one you see here is for the owners and another bone-shaped one for the pooches. Although you'll have to wait to see this episode, which won't air 'til fall, check out some behind-the-scenes piccys of the party when you