In order to help show Aussie how to behave at the vet, Cesar takes on the role of vet tech for a day. Can he calm this frenetic fellow?

Nat Geo is celebrating the 100th episode of The Dog Whisperer in style–and you’re invited!

In a classic example of the influence of an owner’s mental state on the behavior of her dog, this otherwise perfect pup embodied her master’s anxiety about riding the bus.

Trinity shows signs of being calm and submissive after months of care. Her owners recognize the progress and hope to continue working with their pet.